You need to get yourself some Caustic soda. Get a tub of water (enough to put bars in) and put some caustic soda into the tub. Mix the caustic soda in untill it's all dissolved. Then put the bars in untill all of the anodizing is off. Take the bars out (wearing gloves, this stuff with eat through your skin) and then rinse thoroughly with water. It will be a dull silver then. Just get some wet and dry paper and rub them till their shiny Then get some metal polish and polish them to perfection. Your bars will be very shiny then.