How to craft: Cheap Easy Junk Crates

Hey! This junk crate makes great scatter terrain and is quick and easy to make! You could even use this concept to create some massive terrain if you up-scaled everything. Let me know what you think! :)
Supplies I used:
Wood craft sticks
Corrugated cardboard
Superglue
Ruler
Pencil
Mod Podge
Paints:
Gunmetal
Grey craft
Wood
Dark Brown
Smoke
Bone/Cream color
Ryza rust
Rust primer (Optional)
Shades:
Agrax Earthshade
Biel Tan Green