I bought it at Michaels craft store, in the glass painting section. They have a thinner available but I did not use it. You do want to use the bonding solution. It's the porcelain 150 formula.

The black looks excellent. It looks perfectly factory.

The red looks good, but my substrate metal was corroded gray and that is visible through the transparent red. On a better sample it would look great. I think I'll remove the red and try to get a little more shine before I bake it into permanence.