First of all, Guantee that you’ve taken out many of the grit from the stones. Grit might cause dullness, so make sure to wash them comprehensively with water and a mild cleaning soap. - รถบริษัทไปส่งให้ (ในกรณีอยู่ในเขตขนส่งของบริษัท) Fill barrel ¾ entire with stones and shake to settle. Never use fewer, it https://beediadiamond.com/catalog/polishing-stones