the best product I have found to use after trying just about everything out there is a alum polish that work best and coats to retain a good look for many months . below is a pic of cleaning comparison to one of the most used alum polishes on the market mothers alum polish on the left and Buschs alum polish on rite, although you can only find this product at a truck supply house or a truck stop you can order it directly from buschs ,they carry a whole line of alum cleaning products and Ive found no better and does not take a lot of hard work to use and highly recomend to get your bike looking its best.