In the past I have used thin strips of fine grit sand paper to pulley motion polish the machine marks off the hammer / trigger / cylinder stop pins. The hammer pin is always the easiest as there is generally more room for finger tips to work in that space; the cylinder stop pin area is impossible.
So, I used some different sized slotted roll pins to hold the 400 grit paper and chuck the roll pins in a hand held drill to quickly and symmetrically polish the axles in a matter of seconds. A thin strip of masking tape is used to prevent the sandpaper from rotating out of the roll pin; a proper sized drill bit is used as a mandrel to wrap the sandpaper within the roll pin.
Just thought I would share this method that some might find useful.
So, I used some different sized slotted roll pins to hold the 400 grit paper and chuck the roll pins in a hand held drill to quickly and symmetrically polish the axles in a matter of seconds. A thin strip of masking tape is used to prevent the sandpaper from rotating out of the roll pin; a proper sized drill bit is used as a mandrel to wrap the sandpaper within the roll pin.
Just thought I would share this method that some might find useful.