1, grinding and polishing: the use of sandpaper, grinding wheel or polishing machine and other tools on the welded interface for grinding and polishing, in order to reduce the obvious welding marks and roughness. Gradually refine the sandpaper particles until the desired smoothness is achieved.
2. Chemical etching: Chemical etching treatment by using an acidic or alkaline solution reduces the visible edges of the welded interface and allows it to blend more evenly into the surrounding metal surface.