The principle of wiping silver bars is similar to physical and mechanical polishing. Generally, the scratched area is polished, filled with rough surface (and the oxide layer on the surface is removed at the same time), and then the treated surface is polished into a shiny surface. The process effect is as follows (Source: Baidu Post Bar).
If the luster of stainless steel is not as bright as before after using iPhoneX for a period of time, it can also be used for friction polishing. You don't have to worry too much about the subsequent damage of the stainless steel middle frame. After all, in many metal grinding processes, the grinding particles become thinner and finally polished into a mirror with finer fibers or even oil grinding; There is no other painting and electroplating process attached to the surface of the silver-white iPhoneX middle frame, so it can be polished with peace of mind as long as it is not too hard-the most important thing is that this silver-wiping stick can really cover 9 packages in 9 yuan (refer to the link, it should be cheaper to buy offline).
As for the paint falling off the middle frame of the deep space gray version, it is not so easy to deal with. Although PVD process is not as easy to fade as painting, the metal background color will still be exposed after wear. If you accidentally drop the paint, the area is very small, you can also cover it with an oily pen, but to the extent shown below, POPPUR's suggestion is not to entangle unnecessarily.
Although silver sticks and oil pens are cheap and easy to repair, at present, the anti-drop mobile phone case may be the choice for iPhoneX users once and for all. After all, in addition to the problem of the middle frame, the glass back cover and screen are also the objects we should focus on protecting, otherwise Apple's outrageous official maintenance price will teach you to be a man in minutes. ......