- 1). Wear gloves to protect your skin from sticking to the Bondo. Clean the surface to which you are applying the Bondo.
- 2). Mix the two parts in a small, plastic container with your putty knife. It has the consistency of chewing gum when properly mixed.
- 3). Spread the Bondo on your repair. Spread the putty and push it into dents with a putty knife. Wipe off the excess. It is better to apply too much Bondo than too little.
- 4). File down the excess Bondo. File as closely along the surface as you can.
- 5). Put on a face mask. Sand the spot being repaired with medium-grit sandpaper; sand in a circular motion. Switch to the fine-grit sandpaper when the putty is flush with the surface.
- 6). Wipe the sanded area with a damp rag. Wait for it to dry completely. Put on your face mask.
- 7). Spray auto primer onto the repaired surface. Wait one hour for it to dry, and then spray the auto-body paint color of your choice.
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