color-fill is a totally different thing.I use a white or yellow crayon.
It's not the most durable in the summer heat, but it does last a good while with normal use and is simple to re-apply. Simply rub it in and use a sheet of paper to rub off the excess before I put it back in the safe.
I typically stay away from the paint. I just don't like it. I see too many C&R guns at Pawn Shops with Krylon Finishes and crappy camo jobs.
True, messed up the fist time and redid it. No biggie.Obviously...
However, whether paint or wax it shows the same.
Neither is permanent and easily removed.