Did some colorfill after liking the looks of some of the AR's and XD's/Glocks I saw it done on. Used some of the wife's white nail polish with hardener(?) and some alcohol prep wipes to pre clean the slide. Brush on, wipe off excess with a piece of coffee filter wrapped tight around the end of a gift card. Fold up a piece of coffee filter soaked in NON-ACETONE nail polish remover to form a pad and lightly wipe back and forth until residue is gone. All that is left is the paint in the engravings. Literally took about 5 mins for both sides. I like it. And I've read that it is very durable too.