Looking for a Step by Step Guide to Painting Rusty-Looking Models

[indigo lake]

U could always buy dirty down rust, that's meant to be unbelievable at gaining rust effects

[rain fern]

Yeah I think that would be most efficient. You’d have to do multiple layers though for full effect.

[analog tinsel]

if you want it to look like the picture i suggest the first half of this video
https://www.youtube.com/watch?v=yvu-fpjDtBg&ab_channel=vallejocolors

with the addition of some texture paint underneath

[foggy rivet]

Thanks for all the info.