1. The good coating is very flat, and the inferior coat […]
1. The good coating is very flat, and the inferior coating will look like a wavy undulation on the surface. Some inferior products have even sunken surfaces.
2. A good coating is more wear-resistant, carefully observe the sample of the business, also wiped every day, the surface of a good product is basically not subject to wear.
3. A good coating is fine and shiny, there is a moist feeling, while the inferior coating is dull.