Brownell's sells several coatings that can be used on anything. Most, if not all, require bead blasting to get a rough surface so the paint or epoxy will stick to the metal. It is all tough stuff. The coating is just about self levleing, and I doubt it will arbrade the bands, regardless of the attachment method you use to mount the bands to the fork. I had planned on using Gun Kote for my mild steel slingshot, but I have been forced to put the project on hold because I want to get the perfect fork height and spread for me before I start sawing and filing on a 1/4 inch piece of steel flat stock.