what steps did you take with the sanding? Im looking to remove the machine lines off of the exterior of my barrel, and used to work at a polishing shop so have an idea what to do, however dont wanna mess up any tolerances that need to be tight.
Would it be safe to lightly rough up the machine marks with 220, step to 400, 500, then finish off with 800 and a polishing compound + dremel?
I agree with the statement "DO NOT USE THE GRINDING STONES ON GUN PARTS". I was using them to remove the flashing on the frame [Dumb move number one..], With the Slide on the gun [Dumb move number two..] Next thing i know ive got a faint line across the muzzle end of my slide [Dumb move number three..]. Good news is this is a great excuse for a HC or Duracoated white slide. Now to find someone who doesnt want an arm and a leg to do it.
Also interesting pack of compounds.. my Dremel 4000 series came with a small bar of red rouge, number 421 for dremel products i believe.