Glad you got her shooting!

I'm NO authority on these matters, but my backpacker is the only rifle I've ever done any polishing on and yes, on the bolt. In my case, the offending area was the bottom/flat area of the bolt. The machining marks were pretty substantial/rough. I used wet/dry sand paper (used dry) starting with about 15 seconds of sanding on each side with 320 grit, wiped down with a VERY lightly oiled/clean rag. Moved to a 400 grit paper and spent about 1-2 minutes on each side with it, then to 600 and spent about 3 minutes a side with it...each time, a wipe with a clean part of the rag.
As with any sanding, tear the paper to a manageable size, and fold it in half to give the paper some stiffness. Keep an eye on the paper and switch to a new spot on it if it's getting clogged-up. You don't want metal "dust" or filings left on the bolt when you put it back in the rifle, so the easiest way to avoid that is to wipe it frequently while you work.
Once you're done and want to test it, double check that it's clean, give all the surfaces a wipe down with a different rag and insert the bolt. You should feel and improvement right away. If you want it a little smoother, then repeat the 400/600 grit steps.
Good luck!