Firstly, Guantee that you’ve eliminated all the grit from the stones. Grit can result in dullness, so be sure you clean them extensively with h2o and a mild cleaning soap. เครื่องเป่าใบไม้ ดูดใบไม้ ใช้แบตเตอรี่ In case you’re working with softer stones like limestone or sandstone, baking soda can perform the trick https://beediadiamond.com/catalog/polishing-stones