Hi all, I've started my brass church panel project and am not sure if I'm polishing the brass correctly. I'm using Brown(Tripoli) buffing compound on a spiral sewn wheel on my bench grinder. I then move to a looser buffing wheel with the white compound. For both process I briefly touch the stick to the wheel and then polish out about 6-9 inched of bar stock then touch the stick to the wheel again and move on. For the most part the pieces have turned out pretty good, but I've been getting this streaking of the compound or something on the brass. On the Tripoli wheel the streaks take on a copper like tint. When I'm finished polishing I wipe these streaks off with a soft t-shirt rag, but at times it takes some effort and I end up putting marks on the brass. I tried using MEK, which sort of worked, but in places it turned the brass cloudy. Any idea what is going on? How to stop it? Or how to remove it without scratching the brass? I've posted picts of what the streaks look like and the tripoli wheel.