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You can change it and spray it directly, but you have to spray it at least twice, otherwise the color can't cover it, and it can't be sprayed too thick, and it's easy to crack.
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The varnish is a transparent color, what color do you want to change? If you don't want a base color, you can spray it with your favorite color after sanding it off.
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It's better not to change, if you do, the color you want is easy to change.
Yes, the lacquer does not affect the adhesion, it is just a bit of a waste (lacquer).
If it is high-end furniture, use Dabao paint, brush it again, see if it can be well covered, find a good painter, it should be able to solve.
If there is a scar in the corner of the painted paint, you have to look at the specific degree, if it is particularly large, you may need to repaint, if it is relatively small, you can add it a little.
Car paint is not only the part of the exterior color, it is a very complex coating, including electrophoresis and middle coating. The surface of this color paint is automatically sprayed by a robot, and it is baked at a high temperature of nearly 200 degrees Celsius for a long time. Furniture paints, on the other hand, cure at room temperature.
To polish first, it is best to grind until there are no bright spots, so that the adhesion is better, and the paint film is not easy to delamination.