ติดต่อ บริษัทขัดผิวโลหะ ลบคมขอบโลหะ-บาร์เร็ล เซอร์วิส To Shine a stone, start off by dipping it in drinking water in advance of rubbing it throughout with 60-grit sandpaper. For the most effective polish, often damp the stone as you utilize the sandpaper to dress in down any sharp edges. Overheated stone – Friction https://beediadiamond.com/catalog/polishing-stones