400 Grit sand paper. WATCH THOSE SRINGS THEY GO ZOOOOOM! REALLY FAST! When you are ready to remove the hand put a rag over it and that will catch it. If you want the whole low down I'll send you some more detailed instructions. its kinda hard to send the IBOK, that's the way hes got it set so I found out after trying to send it to Jaybeth a few times ,but I found out if you join rugerfourm.com you still might be able to get it. Hell if I get this printer going I will print you a copy and just send it to you. I just got into doing Ruger revolvers but I have done a lot of work on 1911's. Rugers are a lot easier.