Defects of car spray paint surface - uplift:
Also known as wrinkling. During the painting process or the drying process of the paint film, the bulge formed in some areas due to the expansion of the paint surface may take on a different shape.
(1) Cause:
①The wrong thinner is used. The use of volatile paint thinners in enamels will promote the rise of the interior paint layer, which will eventually lead to the rise of the topcoat layer.
②Incompatible raw materials are used. The newly sprayed paint layer has chemically reacted with the original paint layer, or the defects of the original paint layer have not been properly handled, and the paint layers are separated from each other, causing the top paint layer to bulge.
③ The bottom layer is not thoroughly cleaned, for example, the grease or wax on the surface of the bottom layer is not completely removed. Due to the influence of the interlayer effect, the re-sprayed paint cannot be attached.
④ The interval between secondary spraying is too short, and the underlying paint is not fully dried, causing the solvent in the wet paint surface to erode the primer or topcoat and soften it.
(2) Correction method:
Sand the defective area until smooth but not worn through and repaint.
