eQualle Sandpaper Sheets for Automotive Primer Sanding (320–800 Grit Guide)

Properly sanding primer is one of the most important steps in auto bodywork. eQualle 9x11 inch Wet/Dry Sandpaper Sheets help smooth imperfections, level body filler, and prepare surfaces for basecoat and clear coat application.

Why Sanding Primer is Essential

Primer often leaves behind a textured surface or uneven spots. Sanding levels these imperfections, creating a uniform finish that allows paint to adhere smoothly and evenly. Skipping this step can result in orange peel, runs, or poor adhesion.

Tools You’ll Need

• Sanding block or orbital sander
• Masking tape and protective sheets
• Spray bottle with water
• Tack cloth or microfiber cloth
• eQualle Wet/Dry Sandpaper Sheets

Best Sandpaper Grits for Primer

• 320 Grit (100-pack) — Levels primer and removes rough spots.
• 400 Grit (25-pack) — Smooths primer for basecoat application.
• 600 Grit (50-pack) — Refines surface for metallic or pearl paints.
• 800 Grit (25-pack) — Final sanding for ultra-smooth primer before painting.

Step-by-Step: Sanding Primer for Auto Paint

1. Apply primer. Spray evenly and allow full curing before sanding.
2. Start with 320 grit. Dry sand or wet sand to level primer and body filler.
3. Switch to 400 grit. Smooth surfaces and eliminate sanding scratches.
4. Move to 600 grit. Wet sand for a refined surface, especially for metallic paints.
5. Finish with 800 grit. Lightly wet sand for an ultra-smooth base.
6. Clean thoroughly. Use tack cloth to remove sanding dust before painting.

Special Cases

For spot repairs, sanding with 600–800 grit is sufficient. For full resprays, use the full grit sequence from 320–800 to ensure consistency across panels.

Pro Tips

• Always keep primer sanding wet to avoid clogging sheets.
• Sand in cross-hatch patterns for even coverage.
• Inspect under bright light to catch imperfections before basecoat.

Aftercare

• Prime and sand again if bare metal or filler shows through.
• Seal with basecoat-friendly primer before applying color coats.
• Store sandpaper sheets flat and dry to maintain performance.

FAQs

• Can I paint directly over primer without sanding? Not recommended—unsanded primer may cause adhesion issues.
• Is 320 grit too coarse? No, it’s perfect for initial primer leveling.
• Do I need to wet sand? Yes, wet sanding with finer grits (600–800) ensures smoother finishes.

Watch & Learn

Achieve flawless automotive finishes with eQualle Sandpaper Sheets (9x11 in, Wet or Dry). Explore the metal sanding collection for your next paint prep project.