Our powdercoaters have supplied us with aerosol paints colormatched to the various powercoats in order to touch up production items....
i cannot comment on thier durability, since i can't usually identify touched-up areas when i come across our products out in the real world, however, i can say that I've never heard of any complains blamed on the touch up paint we use.
if you are interested, I coould find out if these aerosols are formulated differently for ahehesion to tcic or other expoy powdercoats