How to make the optical store display cabinet?

Glasses display cabinets baking paint more, so the main thing is to look at the effect of baking paint, professionals say so, how to identify the quality of good and bad. First look, the surface is smooth, no pimples, no flow hanging, matte effect of thick, glossy effect of light discernment; second smell, smell there is no smell, look at the environmental protection or not; the third ask, ask the resistance to yellowing or not, ask to do a few times the paint, ask the production cycle; the fourth cut, pinch with a fingernail to see if the hardness of the film is not enough.