How to Repair Scratches and Chips Before Painting

Small scratches and chips might seem minor, but they can ruin a perfect paint job if left untreated. Whether you’re refinishing a full panel or just doing a touch-up, proper surface prep is key to a smooth, long-lasting finish.

In this guide, we’ll walk you through how to repair automotive paint damage — from light surface scratches to deeper chips — using affordable, pro-grade supplies available at AutoColorOnline.com.

Step 1: Assess the Damage

Not all scratches are created equal.

• Light surface scratches: Usually only affect the clear coat.

• Deep scratches or chips: Cut through the basecoat or primer, exposing bare metal or plastic.

Tip: If you can feel the scratch with your fingernail, it needs filler or primer before painting.

Step 2: Clean and Degrease the Area

Use a wax and grease remover, such as Grow Automotive 1705, to eliminate any residue.
This ensures the repair materials bond properly.

• Wipe the area clean with a lint-free cloth.

• Let it dry completely before sanding.

Pro Tip: Never use household cleaners — they can leave silicone residue that causes fisheyes in paint.

Step 3: Sand the Damaged Area

Start with 320–400 grit sandpaper for deep chips or 600 grit for surface scratches.
You want to feather the edges of the old paint so the repair blends seamlessly.

• Use a sanding block for flat areas.

• Use your fingers for curved sections.

Optional: If the scratch goes down to bare metal, finish with 180–220 grit before applying primer.

Step 4: Fill Deep Chips or Gouges

For deeper imperfections, apply a spot putty or glazing filler.

• Spread it evenly using a plastic spreader.

• Let it cure (usually 15–30 minutes).

• Sand smooth with 400–600 grit paper.

Products like USC Icing or Evercoat Z-Grip Glaze are great for small surface repairs.

Step 5: Apply Primer

Once the surface is smooth and even, apply 2–3 light coats of primer.
We recommend a 2K urethane primer for the best adhesion and build.

• Hold the can or spray gun about 6–8 inches away.

• Allow proper flash time between coats.

After drying, sand the surface again with 600–800 grit sandpaper until it feels perfectly smooth.

Step 6: Blend and Paint

Now the area is ready for basecoat and clearcoat.

• Spray thin, even coats to blend the color.

• Once dry, apply 2–3 coats of clear for protection and shine.

Shop our paint kits and clears for complete systems that include base, clear, and activator matched for your project.

Step 7: Final Polish (Optional)

After the clear coat cures, lightly wet sand with 1500–2000 grit and finish with a polishing compound for a mirror-like gloss.
Avoid heavy buffing for at least a few days to let the clear fully harden.