How to Wet Sand Headlights for Crystal-Clear Results (600, 1000, 1500, 2000 Grit Guide)

Foggy, yellowed headlights not only look bad but also reduce nighttime visibility and safety. Replacing headlights can be expensive, but with the right sanding technique, you can restore them to near-new clarity at home. Wet sanding headlights is one of the most effective DIY restoration methods. Here’s how to do it step by step using the correct grit sequence.

Why Wet Sand Headlights?

Over time, UV rays and road debris break down the outer layer of headlight plastic, causing cloudiness and yellowing. Wet sanding removes the damaged layer, smooths the surface, and prepares it for polishing and sealing. This method restores clarity and improves light output dramatically.

Tools You’ll Need

• Spray bottle filled with water and a few drops of dish soap
• Masking tape to protect surrounding paint
• Microfiber towels
• Plastic polish and UV sealant
• Wet/dry sandpaper sheets

Best Grit Sequence for Headlight Restoration

• 600 grit (25-pack) — Removes heavy oxidation and deep yellowing.
• 1000 grit (100-pack) — Refines the surface after coarse sanding.
• 1500 grit (25-pack) — Smooths out fine scratches for clarity.
• 2000 grit (50-pack) — Final polish prep before sealing.

Step-by-Step: Wet Sanding Headlights

1. Clean and mask. Wash headlights thoroughly and tape around edges to protect paintwork.
2. Start with 600 grit. Wet the surface and sand in horizontal strokes using 600 grit sandpaper. Keep the surface wet at all times.
3. Smooth with 1000 grit. Switch to 1000 grit sheets and sand in vertical strokes to remove sanding marks.
4. Refine with 1500 grit. Use 1500 grit sandpaper in circular motions to restore clarity.
5. Finish with 2000 grit. Apply 2000 grit sheets to polish the surface before sealing.
6. Polish and seal. Apply a headlight polish, then finish with a UV protectant to prevent future yellowing.

Special Cases

• Severe oxidation: May require more time with 600 grit before moving up.
• Minor haze only: Can often be fixed starting at 1000 grit.
• Professional-level shine: Follow sanding with a buffing pad and compound.

Pro Tips

• Always sand in alternating directions with each grit to ensure even results.
• Keep headlights constantly wet to avoid scratches.
• Finish with a UV sealant—skipping this step means headlights will haze again quickly.

Aftercare

• Reapply UV sealant every 6–12 months to maintain clarity.
• Wash headlights regularly to reduce buildup of grime.
• Avoid harsh chemicals that may damage plastic.

FAQs

• How long does headlight restoration last? Typically 1–2 years with proper sealing and care.
• Can I use a power sander? Not recommended—hand sanding gives better control and prevents damage.
• Do I need clear coat after sanding? A UV sealant or clear coat is essential to protect the plastic.

Watch & Learn

Wet sanding headlights with the right grit sequence is the most affordable way to restore clarity. Stock up on super fine sandpaper sheets and bring your headlights back to life.