"Rust on a brake...thing" - 15 min Variety Node Pack test

So i got my hands on Variety Node Pack by Stuntkoala, and I must say, it’s pretty impressive how easy it is to make procedural PBR materials. In about 15 minutes I made a quick car brake… I guess… Don’t judge me, I know it is not looking like a real car piece, I know nothing about car’s innards, and had no access to the internet for references T_T