Generally, it can be welded, except the mechanism chain. There are generally two understandings of platinum: white 1: white 18 gold 2:PT platinum. If it is white 18K, the 75-ear gasoline torch will be a little yellow and need electroplating, which needs to be electroplated in a professional shop. The effect is not affected by electroplating, and the effect is good after polishing. If it is PT platinum plus weldment, it will be welded and polished by water-oxygen welding machine. Or hard welding with a water-oxygen welding machine without welding tabs, and grinding after welding. Generally, PT platinum welding is not electroplated. However, most mechanical chains are not easy to weld. Generally, there is no guarantee that everything can be repaired, and the specific situation needs to be treated specifically. I hope I can help you.