I borrowed a 1/4" drive Dewalt drill from work that turns 4000 RPM and it's been working great. I just have to be careful not to hit the chuck up against the work piece. I'm using felt bobs w/emery and it's creating "lines" in the aluminum. How do I go about getting them out? Should I use another bob with another compound? The bobs are getting the glazed look on them, do they need to be cleaned or should I get another one? Thanks. Later on.
Steve
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