Rusting Painted Metal Material Study
Many parameters can be exposed to control different parts of this tiling texture like drop color, stain, aging, dirt, rust dripping, and much more!
Different colors with much storytelling can be applied to this tiling texture!

The left breakdown is for rusting painted metal and the right is for rust!
Rusting Painted Metal Material Study
100% created in Substance Designer and rendered in Marmoset Toolbag 4!