I went and asked my boss (I work for glockworx ) about how he does the grip reduction and the various texturing as well as the stippling tool as mentioned in the other thread. Well I got an ear full. In fact he said if I was so interested in it and I was telling people about it I better learn how to do it. So I went about doing a aluminum oxide grip and a stipple grip on two of my frames. The first step and the most time consuming is the prep. The grip has to be shaved down and roughed up before it can be textured. We used a belt sander (2" wide belt) to sand the rear hump off the backstrap to flatten it out, and to take off the finger notches. The grip has to be turned/rotated as you sand on the belt sander to keep from making a nasty flat spot. There was also a trick of then to use the edge of the belt, when to flex the belt and pressure. Took me a while to get the hang of it and my boss had to step in a few times to correct little mistakes. After shaving 2 grip I was covered in polymer dust. It was fairly time consuming and messy. You can do all this with a dremel but it is harder to get everything even, and takes 10x longer. The finger grooves take a long time to sand flat with a dremel. Next we went at the grips with a dremel to cut the bottom of the trigger guard. This part was shapped to my hand. This part also took some time to get right. The sides and the backstrap were further shapped so the gun indexes naturally for me and I could reach the mag release without shifting my grip. The whole grip was then touched up for the next step which was texturing. Here are some pictures to give an idea of how much material came off the grip.