Use your fingers to press the paint surface to see if there are clear hand lines. If there are hand lines, it proves that the paint film is dry and bad. Demand from the new paint room to stop baking. Drive the car to a light, carefully observe the touch-up paint and the adjacent car body, and stay for 7-10 seconds (eyes should not work too long, which will cause visual fatigue).
Observe the color difference between direct and strabismus (30-45 degrees). Note that dark cars should be compared with light, light cars should be compared with light. After painting, as like as two peas, it is impossible. The painting of the plastic parts of the car body should be slightly brighter than that of the metal parts.
Check the fullness of the paint film directly. If the paint film is too thick, it feels turbid, and the paint color is not bright. If the paint film is too thin, the paint surface is not bright, and the paint color is dark. The film with good fullness feels as if there is a layer of oil floating on the paint surface. Face up to the paint surface to have mirror effect, positive and squint paint grain and original factory paint grain to average. What's more, it's impossible to have no paint marks. Even after polishing, there are also paint marks on the original car. If there are no paint marks, the consequences are not good.