cheap rifle finish possibly worth a shot?

https://www.youtube.com/watch?v=7KdP4XZErRk&t=3s

might be worth a go for someone, would have tried myself but got duracoat

Just degrease the outside of the gun and expose it to the elements to let it gently rust, and oil it when it's done. A quite durable retro-looking coat, makes an AK look authentic, like you got it from a Kazakhstan sheep farmer.

my project rifle had something like this on it when I got it.
Put on pretty thick, not that flash.

I was thinking of doing this with a rifle using colour matched spray cans. I am going to research this and find out if very fine rattle can tips are available and if you can get epoxy mix here.