Eugenio Pignataro shares an addon for Blender that will create worn edges, adding more realism to your Blender models.

The addOn creates a map fast vertex color, which can be used in various ways

Eugenio notes that the drive for the Addon was the fact that typically the edges on real life objects are more exposed to wear than smooth surfaces, causing them them to break down faster than the rest of the surface.

It is this premise that the Create Worn Edges Map Addon builds a map from vertex colors that can be used as a matte for mixing two materials, depicting a worn look. Check out the Create Worn Edges Addon for Blender here.