The 'solenoid Engraver' Proof of concept Solenoid Power graver

Calling all electronic/adunio peeps,to jump in with projects that would create the same effect,more efficiently. I'm sure the overheating is an easy fix,for a clever person.like yourselves? PM or leave a comment. Engraved coins for Circuit boards,if you like :)
No time ,or patience,to spend on this,so just letting it out there for others to complete.
It would be more cost effective,to work on this rather than making a Car pump version,as the cost is so low,and the fact that there is no air,makes it possible to make the handpiece from anything,wood,plastic or any type of metal.
This solenoid was 12v 0.6 amps,have orredred a 6amp version,so maybe that will solve the heating problem,but think that is really just a matter of getting the pulse circuit to switch off and on more efficiently .
NOT! the digital version. www.ebay.co.uk/sch/i.html?_fr...
www.ebay.co.uk/itm/10x12V-Wir...
www.ebay.co.uk/itm/DC-12V-0-4...