Removing Discolorations from Sinks and Other Ceramics
配方组成:
10% Hydrochloric Acid/3 oz. "Bon Ami"/0.5 can
配制方法:
Mix the two thoroughly. Apply the paste to the discoloration, allow to stand 15 minutes. Rinse the paste off thoroughly with water. The item will be free of the objectionable stain. Repeat if necessary.