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How To Fix a Rust Bubble Under Paint From a Rock Chip Around The Windshield

How To Fix a Rust Bubble Under Paint From a Rock Chip Around The Windshield

A rock chip in the paintwork exposes metal and, over time, will rust and bubble beneath the surrounding paint. This occurs when rock chips are left un-repaired, so it is best to cover up stone chips with touch up paint as soon as you can.

What you will need:

STEP 1 - Clean the entire area with wax and grease remover Ensure all contaminants such as wax, tar, road grime, or anything that may get ground into the surface with sandpaper.

STEP 2 - Protect the surrounding areas and trim If the surrounding trim cannot be removed, place a Q-tip between the trim and the edge and mask around the entire area.

STEP 3 - Remove the rust Using a wire brush on the grinder, remove as much of the surface rust as possible. Rest your arms on the car to hold the grinder steady. Remaining rust can be removed using sandpaper on a sanding block, using the rough 80 grit sandpaper. Sanding using a cross-hatch pattern ensures even coverage down to the metal. Don’t be afraid to continue sanding outside the damaged area.

STEP 4 - Apply the body filler Clean the sandpaper dust off the entire area using compressed air to ensure no dust particles remain. Mix body filler and hardener according to the instructions on the can and lightly spread the filler using a squeegee over the sanded area. Allow the filler to cure according to the instructions on the can. Using the 80 grit sandpaper sand the area using a cross hatch pattern again, working your way through the sandpaper grits, from rough to smooth.

STEP 5 - Spot Putty Minor imperfections can be repaired using spot putty. Allow to dry and sand again with 400 grit sandpaper.

STEP 6 - Primer Mask off the areas surrounding the repair where you don’t want spray or paint to reach. Clean the entire area with wax and grease remover and let dry. Apply a coat of self- etching primer. Next, apply a coat of filler primer and when dry lightly sand with 400 grit sandpaper to ensure the surface is perfectly smooth. Finish off with the fine 600 grit sandpaper.

STEP 7 - Paint Thoroughly clean and dry the repaired area and apply the first coat of Perfect Match Paint. Once two or three coats are dry, it’s time to apply Clear Coat, repeating the process lightly layering two or three coats and allow to dry. Finally, buff the area with a polishing buffer.