Things You Will Need
It can also be used to fill a hole in the sheet metal, such as a bullet hole or other puncture.
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Prep the surface with a Scotch-brite pad or 220-grit sandpaper. Scuff the area around the bullet hole and blow off sanding dust.
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Mix the Bondo. Follow the kit instructions to mix the hardener with the filler. Stir it until it reaches a uniform color.
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Use a plastic squeegee to apply the Bondo mixture to the bullet hole. Even out the surface with spring steel and remove excess filler.
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Use the sun or a heat lamp to harden the filler on the car panel. Allow the mixture to harden for 10 to15 minutes. Sand over the area after the filler has hardened.
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Check for high and low spots in the hardened filler while sanding. Mix and apply additional Bondo filler, if necessary.