Check out a tool by Simon Verstraete and a tutorial by Keegan Keene.
Simon Verstraete has recently shared a look at a tool he's been working on a tool that allows creating edge damage decals based on trim texture. The tool lets the artist model a shape and view the result at the same time. He noted that the tool works great in stylized scenes.
Want to learn more about this approach and how it can be used for different environments? Keegan Keene has a great tutorial on how you can generate and use damage decals in organic environments. You can find it here.