Guys watching a Youtube about removing small scratches on aluminum using 3M scotch rite wheels for grinder or electric die grinder.But they never said which ones,so what I have done so far to aluminum for my tramming indicator tool is sanding to 400 but there is curved which I had plan to buy couple these wheels say 4” and 2” for die grinder but don’t know which ones to put the finishing touches.I also plan to use small buffing wheels with compound to bring to shine.Any suggestions or maybe website?Thanks guys