Decided to do some stippling to add texture to two of my polymer pistols... Sig Pro SP2022 9mm and Kahr PM9 9mm. Process used; using various bits on a $15 wood burner, patiently (it will be rewarded) dimpled the surface of the area intended to add texture. If desired, go over finished grip with sand paper. Practiced on the empty abandoned Sig case, then moved onto my Ka-Bar TDI knife... Before: After: Magazines extensions for the Sig SP2022 and Kahr PM9... Before: After: In between: Kahr PM9... Before: After: In between (Top complete, bottom still stock) w/ completed magazine: Added some texture to the back: Sig Pro SP2022 9mm... Before: After: I had intended on just getting tape, but figured if I screw up the stippling royally to the point of no return (doubtful), I'd just cover it with tape. I feel like the stippling provides a much deeper, grip-able (?) texture than any tape I've seen... and when the final product is sanded down, it's not rough at all. Overall, I'm EXTREMELY happy with the ending results... I feel like I have a much better purchase on the Sig Pro, and the Kahr feels a bit better than the stock texture. The Ka-Bar was intended for practice but it turned out very well, IMO. Total process took about an hour and a half to do three magazine extensions, two pistols and one knife.