To begin with, make sure that you’ve taken out many of the grit from the stones. Grit can cause dullness, so be sure you clean them comprehensively with water and a gentle cleaning soap. หินขัดแม่พิมพ์ / หินน้ำมัน สำหรับขัดขึ้นเงา และขัดรอยไหม้ This is realized with the continual friction involving the rock and https://beediadiamond.com/catalog/polishing-stones