Look in the FAQ for rec.crafts.metalworking. There is information about coloring brass, aluminum and other metals too. There are currently 11 parts, from metal1 to metal11: http://atlas.unm.edu/smith/metal1.faq.html Aart M. Olsen mailto:aart@uiuc.edu 217-244-4688 Library Systems Office Univ of Illinois at Urbana-Champaign