After countless hours with a heatgun/torch/chisel/scraper/oxide discs/etc I've found that using a wire wheel with very short wires that won't "lay down" works very well. With decent pressure it destroys everything in it's path and will take things down to bare metal instantly. So quickly that the underbody coating comes off as dust. It won't heat up and/or smear around. No acids/strippers, goo, multiple layers to remove. Cheers
Been using this method and the dust smells pretty toxic....it also creates some kind of blue smoke that has got me concerned about my lungs. Pretty effective method if you are in a well ventilated area
angle grinder & wire wheels are great for a lot of things, their downfall is you gotta protect your lungs from the dust they create. don’t risk your health for a car repair people, get proper respirators & do it right!
ya can use a torch its quicker just move the flame around kinda quickly in 1' x 1" area for a about minute and then scrape whats left comes off with acetone and steel wool no damage to metal comes super clean and ready fro a 1 or 2k primer/topcoat
Decided to take mine off in the end, used a vibrating multi tool in the end with a thin chisel blade on, was a lot easier than I thought, your videos are a great source of info, thanks for your efforts shooting them 👍
Absolutely. Saw your comment, went to Northern Tool, picked one up for $22 (ironton). Had both of my wheel wells cleaned out in under an hour. By far the most efficient way. Thanks for that.
@@StewartMotoring Thank you for the caution. I figured any tiny dents would come out when sanding down to bare metal with 80 grit. I will double check that because maybe they won’t. Again, thank you.
I just got done doing this a couple weeks ago on my project. For people who don't have a decent compressor to keep working with an air chisel, you can use a multitool with a scraper blade. I mostly used the propane torch and a hand held scraper. For the residue, I heated those up with the torch before hitting it with the wire wheel. It took me a whole week to remove the whole underside of the car and inside the wheelwells. It's not very fun at all.
Gasoline melts undercoating. Soak it down, then scrap or scrub with a copper scrub pad then wipe up the goo with paper towels. Fairly fast and a ton cheaper than Goo-gone.
Waft a Map gas torch over it. The heat/flame makes it brittle. Then use whatever you prefer to whip off the burnt coating - it takes no time at all once you have flamed it. You are down to bare metal in a jiffy. If you encounter deep factory seam sealer, the same method works best - burn it, then scrape. You then no longer spend ages mucking about with sealants/coatings - they all become a doddle. If you hit real thick filler on a panel, same method works fastest - burn it off. It gets you back to bare metal real quickly.
I've never seen any kind of blasting remove any resin like substance. I have seen people use dry ice on the interior resin, sound deadening stuff though. It flaked off very easy once frozen. I've seen it on tv but never tried yet.. I've been wanting to give it a shot
Great work. Do you recommend undercoating? I saw some videos on TH-cam suggesting undercoating is not beneficial to resist rust and might trap moisture? Please suggest?
that air chisel works a treat! I've done all the interior sound deadening in my car, now i need to do the under body sealer, and i'm not really looking forward to it, especially that its around 47°C here in Sydney now! (that's 117°F to you!)
Wow I have never experienced heat like that. Gooood luck with that as well as the underbody of the car. I do not miss doing that! Mine was super oily and nasty
you need a thicker putty knife then that one you have a heavy duty version of that then just scape I found that the old under coat on Z cars will just scrape off with a heavy duty sharp and keep it sharp scraper. Heat can just make it messy but in some areas just may be what you need. good video keep that car progressing. I almost have both of my Z cars floor and chassis completely welded up so I'm happy to be able to soon turn it right side up for good ha!
Very informative video, thank you so much! The fastest way is obviously the vibrating scraper, but could I use with similar results a powerful wire wheel? I intend to put extra sound insulation on the wheel arches (on the chassis itself, not the plastic liners), so the protective coating has to come off completely.
It was dirty, filled with grease/oil, and wanted to remove to check for hidden rust. Otherwise yes it is very beneficial. Acts as a sound deadening for rocks and is a durable surface for long term.
Thanks for some really good tips. I you want to hear them i have a few tips on the video production. Keep the music down and don't cue it for every little segment where you're not talking. Think of it as something that will help for longer segments where the "travel" might become booring.
Its easy here in australia its already hot so we just get a rag and it falls off haha or when it is a bit harder just use brake cleaner and a rag and it falls off
try giving it a lot of heat with a heat gun/blowtorch and then when the stuff is soft shift it around as much as you can with a towel and after that try some really VERY strong industrial solvent on a towel and it might wipe off pretty well, of course depending on the coating that you have on there
Sweet thank you sir that’s what I’m going to be tackling for the next few weeks getting rid of all the old undercoating putting new Now I can do it with confidence and know I’m doing it right👍🏼
Sleek S oops I looked it up and I didn’t know that aircraft stripping what’s the chemical you can use but that works really well and undercoating to remove it also??
I wish aircraft remover was still sold...Im tempted to use my last bottle to get this crap off. Its such a bad product in my opinion...but I guess for people that never wash their car and only want it lasting 10 years its fine...things that go to 50 years or more should just be washed and dried... Ill look into your tip. Looks a lot easier than the chisel (i did that in my second to last vid and the one Im editing now lol...Im working on a 74 Ranchero)
Haven't watched it yet but I've done the drivers floor pan on my 82 golf two knotted wheels on a angle grinder. Took just under an hour, and some sore forearms
Probably not necessary but most people do when they do a full restoration. Mainly to keep it from catching fire with all the welding and to put some new underbody coating on
After countless hours with a heatgun/torch/chisel/scraper/oxide discs/etc I've found that using a wire wheel with very short wires that won't "lay down" works very well. With decent pressure it destroys everything in it's path and will take things down to bare metal instantly. So quickly that the underbody coating comes off as dust. It won't heat up and/or smear around. No acids/strippers, goo, multiple layers to remove. Cheers
where did you get that the wire wheel
@Heffalompen You can get a chisel that works good at Harbor Freight. I rounded the blade on mine to make it easier to use.
Been using this method and the dust smells pretty toxic....it also creates some kind of blue smoke that has got me concerned about my lungs. Pretty effective method if you are in a well ventilated area
angle grinder & wire wheels are great for a lot of things, their downfall is you gotta protect your lungs from the dust they create. don’t risk your health for a car repair people, get proper respirators & do it right!
I’ve been using wire wheel too
Eastwood sells a product undercoat removal its made with citra safe, coats in a foam, let it soak, scrapes off easy with a 45 deg scraper,
ya can use a torch its quicker just move the flame around kinda quickly in 1' x 1" area for a about minute and then scrape whats left comes off with acetone and steel wool no damage to metal comes super clean and ready fro a 1 or 2k primer/topcoat
I used a blowtorch for it. Once most of it is off, used a knotted wire wheel for the rest.
Your videos helping me get motivated to continue with my project 240z. Thanks!
Thank you, I appreciate it. I've got a Snapchat now. I'd love to see your project. Snapchat: BuiltNotBoughtZ
I used a harbor freight multi tool with scraper blades and once the rubberized came off. I used a twisted wire cup brush. Worked like a charm
Decided to take mine off in the end, used a vibrating multi tool in the end with a thin chisel blade on, was a lot easier than I thought, your videos are a great source of info, thanks for your efforts shooting them 👍
On Insta project_fairlady_z if u want to see pic 👍
Multi tool was a life saver
best way is a pneumatic needle scaler. Harbor Freight sells one for $55. Low cost and it gets into the tight spots very well.
Absolutely. Saw your comment, went to Northern Tool, picked one up for $22 (ironton). Had both of my wheel wells cleaned out in under an hour. By far the most efficient way. Thanks for that.
Needle scaler worked really nice,followed by a stiff wire wheel
I’d like to recommend an air needle scaler. My inexpensive Harbor Freight scaler did the trick. Each fender (1957 Chevy 3200) took about an hour.
I’d be careful with that though, it can lead to many little dents into the sheet metal. Obviously not critical for underbody, but still, not ideal
@@StewartMotoring Thank you for the caution. I figured any tiny dents would come out when sanding down to bare metal with 80 grit. I will double check that because maybe they won’t. Again, thank you.
I just got done doing this a couple weeks ago on my project. For people who don't have a decent compressor to keep working with an air chisel, you can use a multitool with a scraper blade. I mostly used the propane torch and a hand held scraper. For the residue, I heated those up with the torch before hitting it with the wire wheel. It took me a whole week to remove the whole underside of the car and inside the wheelwells. It's not very fun at all.
Great video Mate, superb info, I'm just debating if I take mine off
Can you just spray fluid film or oil over it?
Gasoline melts undercoating. Soak it down, then scrap or scrub with a copper scrub pad then wipe up the goo with paper towels. Fairly fast and a ton cheaper than Goo-gone.
You can use diesel or brakecleaner to clean it up
Waft a Map gas torch over it. The heat/flame makes it brittle. Then use whatever you prefer to whip off the burnt coating - it takes no time at all once you have flamed it. You are down to bare metal in a jiffy. If you encounter deep factory seam sealer, the same method works best - burn it, then scrape. You then no longer spend ages mucking about with sealants/coatings - they all become a doddle.
If you hit real thick filler on a panel, same method works fastest - burn it off. It gets you back to bare metal real quickly.
I've never seen any kind of blasting remove any resin like substance. I have seen people use dry ice on the interior resin, sound deadening stuff though. It flaked off very easy once frozen. I've seen it on tv but never tried yet.. I've been wanting to give it a shot
Great work. Do you recommend undercoating? I saw some videos on TH-cam suggesting undercoating is not beneficial to resist rust and might trap moisture? Please suggest?
Awesome video man. But if user a non metallic scraper do you don't scratch up everything underneath.
that air chisel works a treat! I've done all the interior sound deadening in my car, now i need to do the under body sealer, and i'm not really looking forward to it, especially that its around 47°C here in Sydney now! (that's 117°F to you!)
Wow I have never experienced heat like that. Gooood luck with that as well as the underbody of the car. I do not miss doing that! Mine was super oily and nasty
The best way I've too do it it too buy a hand grinder at harber fright and use it with the wire wheel come off so much easier
you need a thicker putty knife then that one you have a heavy duty version of that then just scape I found that the old under coat on Z cars will just scrape off with a heavy duty sharp and keep it sharp scraper. Heat can just make it messy but in some areas just may be what you need. good video keep that car progressing. I almost have both of my Z cars floor and chassis completely welded up so I'm happy to be able to soon turn it right side up for good ha!
Sounds like more elbow grease haha. I'm sure it works fine, no matter what it's not fun and takes a while.
Would not lacquer thinner take off that coating?
Possibly but seems like a lot more elbow grease/mess
@@StewartMotoring Yeah, mine looks like it's BBQd on there.
Thinners or gun wash takes the little bits of underseal off after using scraper messy but satisfying lol
hi gentleman, i wanted to know where you bought your pneumatic scraper, if you could put a link to find it? thanks in advance
I'd be curious as to how much weight you've reduced from the car.
Bit of white sprit to wipe off the left over bits
Very informative video, thank you so much! The fastest way is obviously the vibrating scraper, but could I use with similar results a powerful wire wheel? I intend to put extra sound insulation on the wheel arches (on the chassis itself, not the plastic liners), so the protective coating has to come off completely.
I didn’t have good luck with the wire wheel alone, but hey, it may work for you!
Thank you for the video. I'm removing the undercoating from my evo, so I can sandblast and restore the car
Amazing video hands down! Thank you! What did you coat it with after stripping it all?
Diplude I used a truckbed liner. I have a video for that too
Two questions
Is underbody coating beneficial?
Why are you removing it?
It was dirty, filled with grease/oil, and wanted to remove to check for hidden rust. Otherwise yes it is very beneficial. Acts as a sound deadening for rocks and is a durable surface for long term.
Thanks for some really good tips.
I you want to hear them i have a few tips on the video production. Keep the music down and don't cue it for every little segment where you're not talking. Think of it as something that will help for longer segments where the "travel" might become booring.
I’ll keep that in mind thanks
Its easy here in australia its already hot so we just get a rag and it falls off haha or when it is a bit harder just use brake cleaner and a rag and it falls off
Lmao
did it work on the inside floors?
I used dry ice for the floors
try a vibrating multi-tool with a blade...
www.harborfreight.com/oscillating-multi-tool-62866.html
Did you watch the full video? I ended up using a very similar tool. But I did just buy a Kobalt oscillating tool so that will be nice for future use.
Good vid, I gotta do my jeep ! Thanks!
Does paint stripper work????
That will probably make a mess of it
This is where I'm coming from I have underseal in the engine bay which I want to remove, but I don't want paint to come off
Please reply
Joe
try giving it a lot of heat with a heat gun/blowtorch and then when the stuff is soft shift it around as much as you can with a towel and after that try some really VERY strong industrial solvent on a towel and it might wipe off pretty well, of course depending on the coating that you have on there
i've also heard that using floor wax removal stuff might work pretty ok
Dry ice blasting....much better than sand blasting and in no way abrasive!
Great tip, thank you!
thanks for the tips
You bet!
Couldn't paint Striper remove the undercoating?
I doubt it
power always helps lol... bout the way I do it I used map gas then wire but taking it off cold is a new idee!! fosho!! ..check ya later buddy ..toppy
Thanks for this trick!
Sweet thank you sir that’s what I’m going to be tackling for the next few weeks getting rid of all the old undercoating putting new Now I can do it with confidence and know I’m doing it right👍🏼
Aircraft stripping works well for me.
Sleek S I don’t know what aircraft stripping is but can I just look up a TH-cam video and attempt it ?
@@hectorromero3536 you sure can. There is a video of two gentleman who use it on a blue Datsun 240z. Works great.
@@hectorromero3536 look up paint stripper on bed liner 240z.
Sleek S oops I looked it up and I didn’t know that aircraft stripping what’s the chemical you can use but that works really well and undercoating to remove it also??
Great tip.... thank you
I wish aircraft remover was still sold...Im tempted to use my last bottle to get this crap off. Its such a bad product in my opinion...but I guess for people that never wash their car and only want it lasting 10 years its fine...things that go to 50 years or more should just be washed and dried...
Ill look into your tip. Looks a lot easier than the chisel (i did that in my second to last vid and the one Im editing now lol...Im working on a 74 Ranchero)
Haven't watched it yet but I've done the drivers floor pan on my 82 golf two knotted wheels on a angle grinder.
Took just under an hour, and some sore forearms
Can anyone give me the part number for the Snap on air-chisel?
PGS1004.
One on eBay selling for 80 bucks.
Thanks bro.
Sheet off the area and sandblast.
Sandblasting is by far the quickest way.
What type of media do you use?(I don't want to remove metal.)
702justin702 blasting in most cases make it soft again , unless a brittle bitumen it may come off
go blues
Or go get it dry ice blasted. $$$, works perfect.
6:28😂😂😂
3 words. SAND BLASTER
That can warp metal
if it comes off from compressed air... fine, otherwise it is firmly affixed,... if you need a heat gun to remove, you're wasting your time.
Could be hiding rust which would be the reason most remove when doing a full resto.
Hot pressure washer 230 degrees off in seconds
The harbor freight air chisel is complete garbage. Best to buy a used higher quality air chisel.
this is nightmare
My bad 2 words
if its that hard to get off i dont see the point of removing it
Probably not necessary but most people do when they do a full restoration. Mainly to keep it from catching fire with all the welding and to put some new underbody coating on
please..no need for the music......but good vid otherwise
Another client of shittyyoutubemusaks.com
That was painful to listen to. A wide variety, yet still Noise without a point.
what is with the jacked up horrendous Music, I'd rather listen to the heat gun, air scraper or wire wheel
And I’d rather not have to read your comment but here we are.
Change your title that is by far not the easiest way
why stupid music, you started so well