i just bought a kel-tec pf9 and wanted to polish up the feed ramp. i havent had a chance to take it out yet to see if it has any problems with feeding yet. should i just let it go if it works fine or should i just go ahead and do it? if/when i do it, should i use a certain grit sand paper or what? ive been spoiled in having my previous only semi-auto being a 24/7, and that ramp comes so polished i can see my face in it.