How important is the anodizing in the area to be machined? You can quickly remove it by dunking it into a lye solution (caustic soda). This chemically eats away the anodized layer which is extremely thin. Do not leave it too long since it will continue into the underlying aluminum as well. Need some experimentation. Be very careful with caustic soda solution, it is very aggressive to clothing, skin, and especially eyes. Wear eye protection. Rinse the job well in fresh running water afterwards. |