The plexiglass belongs to plastics, scientific name polymethyl methacrylate, which is a macromolecular compound that is polydifferentiated from methacrylic esters. The appearance of lubrication, colorful, small proportion, strength, plexiglass resistant to erosion, moisture, light, insulation is good, sound insulation is good. It is easy to cut and stick, with all the properties of plastic. The cloth wheel is made by Fu. One is that the temperature is high and the plexiglass will melt; the other is the unevenness of the cloth wheel wearer. We also tried to grind with toothpaste and dipped in water. The result was slightly better, but it was still not up to the requirement, and it was inefficient with manual work.

