Hello Are you aware of any frequent low cost family items that could be applied as substitute for grit or polish like it's possible coffee, salt, cashews, rubber bb’s, etc? ติดตั้งง่าย ใช้งานได้กับทุกพื้นที่ ทั้งภายในภายนอก Clean the rocks with soap and water. Fill a bucket with warm water and liquid cleaning soap https://beediadiamond.com/catalog/polishing-stones