I used it on my bike's wheels, they haven't hit the street yet but here's a story for you about how hard this paint is. Bead blasted alloy wheels then 800 grit to the perimeter for a bit of shine, I masked off the shiny areas with painters tape and sprayed 2 light coats and one heavier coat as instructed. Then I placed the wheel in a cardboard box heated with a 150 watt spotlight and covered the top with scrap cardboard, I left it there to bake for two weeks. When I took the wheel out of there and removed the tape there were areas I could have masked better, removing the overspray...about a millimeter or so around the perimeter on both sides of the wheel took me over an hour with 400-600-800 grit sandpaper, it was pretty hard stuff.
The next wheel I did the same thing, but I only let it bake 3 or 4 days. The overspray on that wheel came off with just my thumbnail and 800 grit paper. I let the wheels sit for another week before I shot the duplicolor wheel clear, again two light coats and one thick coat as instructed, then I let the clear bake for two weeks also. I think this stuff will be pretty tough on the street.