ViChem VL-555 "High Luster" Burnishing Compound is a mildly acidic burnishing compound which imparts outstanding luster on steel, brass, zinc, aluminum, copper, and most other metals. VL-555 is a fantastic performer when used to clean & polish spent bullet casings. Formulated to provide richer looking parts with all burnishing medias. Mix 1-3oz per gallon of circulating fluid.