How To Use Expanding Foam To Re-Build Your Car
Step 4 – Shaping the Dry Expanding Foam
The dry expanding foam should be cut away with a bread knife or razors. After the foam has been shaved to the size of the area that needs to be filled, it should also be sanded down so that the expanding foam does not sit higher than the original vehicle’s painted surface. It can be useful cut about an eighth of an inch below the original car’s painted surface to leave room for body filler, layers of primer and car paint over it. Be sure not to leave too much expandable foam on, since it will result in a surface that is higher than the original painted car body.
Step 5 – Filling with Body Filler
When applying body filler to the shaved expandable foam, be sure to use a plastic spreader to mix the filler and the hardener liquid before applying it to the foam. The drying time can vary depending on the weather but usually dries quite quickly and will completely dry in less than five minutes, so be sure to apply the body filler with pressure and as quickly as possible. Make sure to notput too much on since you will have to sand the surface down to make it smooth. After about twenty minutes after the body filler application, you can sand it down with sandpaper.