You’ve applied body putty or body filler to the surface of your car, but small holes and bubbles have appeared during the sanding process. When pinholes happen, they can be eliminated by applying and then sanding an additional layer of glazing putty.
In this article, I’ll answer common questions about how to prevent pinholing and eliminate it when it happens.
Pinholes (also called bubbles or air pockets) describe small blisters that break when body putty or body filler dries, creating tiny holes on the surface.
Trapped air bubbles inside putty or filler are exposed after sanding a car, creating small holes or craters. There are three possible causes of pinholing:
To remove pinholing from an affected area, follow these two steps:
Pinholing can be prevented by following these three tips:
By following these suggestions, you can prevent pinholing on the finish of your newly repainted car.