Hi all, I've been polishing brass for the past week or so with fairly good results, but it seems like I could polish forever and not get the last grain marks out. It's not bad in fact it reflects light very well, but up close you can kind of see these foggy lines. My last pass is with white compound on a loose cotton wheel. Could it be the wheel and should i even worry about it since it has to get a glossy clear coat over it anyway?