I was trying to polish my Glock slide so I started with taking the slide to a bench grinder for a 30 minute run on each side, then I sanded each side for 1hr with 200 grit sand paper. She looks really bad, did I do something wrong? I tried to clean her up by heating her up in the oven for 2 hrs on 500 degrees then scrapping with a razor blade and she still doesn't look good. Now I tried to polish my barrel but it doesn't look right either I soaked my barrel for 2 days in very strong acid to remove black color and then I sanded with 200 grit for 1hr. Now I polished her with some Flitz and a very coarse sanding stone on my dremel. Any ideas what I did wrong?