What material is best to polish brass and stainless steel?
Brass is one of the softer metals, and should only be polished with soft materials like the cloth polishing wheel. Care should be given to start with polishing items that will not create more scratching. Start with polishing compound and then proceed from there. If you are removing a scratch, keep the polishing area small, or you could find yourself polishing forever. Keep in mind that if you are polishing an item that is only brass plated, you could easily remove the plating with the polishing compound and tool. Stainless steel is a little different. It’s tougher than brass. You could also find that polishing compound could get caught in the porous finish of stainless, and it would be difficult to polish out. If you are not achieving the look you need on stainless, consider a polishing compound that has higher grit.