Parameters to control:
Amount of rust - rust dots - full rust or parts removed - rust opacity - randomize rust and exposed amount scale - rust drips length, opacity and amount - paint color - paint discoloration opacity - edges jagged or rounded - custom aplha input - custom alpha blending.

You can make lots of variations and styles, play around with the sliders!

For use in Substance Designer, Substance Painter or the free Substance Player - http://www.allegorithmic.com/buy/download.
(Add a curvature map to the custom alpha input with blend on to get those edges rusty!  )

Files include:

- Rusting_Painted_Steel_V1 .sbsar

- 6 pre-exported 2k png textures (AO, baseColor, height, metallic, normal, roughness) + 2 png Masks (Rust and rust with drips)