Question 1

What is the difference between P-grit and CAMI grit?

Accepted Answer

P-grit (European FEPA standard) and CAMI (American standard) are two different grit size standards. They don't correspond one-to-one: P220 is slightly finer than CAMI 220. In auto detailing you'll almost always work with the P scale.

Question 2

What grit do I use to sand out orange peel?

Accepted Answer

Start with P1000 to P1500 for heavy orange peel you want to fully level, then finish with P2000-P3000 before polishing. For light texture, you can start directly at P1500. Always use a sanding block to get the surface truly flat.

Question 3

Can I use sanding discs on a regular angle grinder for paint?

Accepted Answer

No, an angle grinder spins too fast and offers too little control for paint correction. Use a dedicated random orbit (DA) or rotary polisher at low rpm with the correct backing plate.

Question 4

How long does sandpaper last in storage?

Accepted Answer

Stored dry, cool, and flat, sandpaper lasts for years. Moisture is its biggest enemy: water absorption softens the grit and weakens the bond. Discard sandpaper that tears easily, loses its grit, or already feels damp.

Question 5

When should I use sanding film instead of regular sandpaper?

Accepted Answer

Sanding film (with a plastic backing instead of paper) is more durable, cuts more evenly, and clogs less quickly. It's well suited for fine grits on paint but is more expensive per sheet. For rough sanding, regular paper is perfectly adequate.

Sanding Discs & Paper

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Sanding Discs & Paper

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Frequently asked questions