Using a dremel with the felt and the red polish (jewelers) will hardly remove any machining marks or metal for that matter. It will polish the area and make you feel as if you did something but not do much to make it more functional.
I'd leave it alone if it isn't causing you any issues. If it is, send it off if you are not familiar on how do do it correctly.
No, it isn't a very complex procedure like some would have you think. Yes, you can do it yourself with a little patience and careful use of 800 thru 2000 grit wet / dry, followed by the Dremel polish.
Go slow, check constantly and remove only enough to make it function 100% of the time.