Rusting painted metal

Last weekend I went on a Substance Designer binge (post about that coming later), and it culminated with this material, which I ended up spending some more time on. I did a first pass in a couple of hours on Sunday, got some awesome critiques in the DiNusty server, then did a second pass on Monday.
The material is based on a reference from Pinterest that did not fit into this post aesthetically, hehe.