However, Understand that coarse grits can damage softer stones so if in doubt normally start off tiny ahead of shifting on to progressively bigger figures with your grit scale. เครื่องเป่าใบไม้ ดูดใบไม้ ใช้แบตเตอรี่ Clean the rock thoroughly with a scrub brush or previous toothbrush to eliminate any stubborn Filth or particles Successfully Submitted (Awaiting Approval)