well i can tell u this much on methods, i have mine off, i just sanded the inside face just to test if method would work, i polished it by hand and it looked pretty good, i then sanded it with 2000 grade paper, i then polished again by hand with autosol and its shiny but i can still see the scratches from the 2000 grade paper, i hoped the scratches would come out by hand with autosol but no chance, so i figure it has to be done with a electric buff and some different kind of compound like the white or green coloured block stuff
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