... advantages 1, does not affect the color of the machined part; 2, in it is strictly prohibited to iron powder residual process ... all kinds of sand and research of light (Lapping) homework; 2, glass or acrylic product of atomization aesthetic processing; 3, ... black spots, uranium color removal, coloured drawing or pattern rebirth. 2, beautification processing: all kinds of gold, K gold jewellery, ...