800 Grit Sandpaper: Wet Sanding Uses and Finish Checks

Quick answer

800 grit sandpaper is a fine sanding step used for controlled scratch refinement, wet sanding, primer or coating checks, plastics, resin, and pre-polish work. It is not coarse enough to fix deep defects efficiently, and it is not always fine enough to be the final step before a gloss finish. Use it after the surface is already flat and consistent, then move to 1000 grit sandpaper when the 800-grit pattern is even.

Where 800 grit fits

800 grit is a truth-telling step. If deep scratches, chips, or ridges remain, this grit will not hide them. It will polish around them and make the deeper marks easier to see. That is useful when you inspect honestly and frustrating when you try to rush.

Best uses

Use 800 grit for wet sanding clear-compatible coatings, refining primer before finer sanding, smoothing cured resin, preparing plastic for later polish, and softening the scratch pattern after 600 grit. It can also help when a surface has light dust nibs or very shallow texture, as long as there is enough coating thickness to work safely.

Keep pressure light. At this stage, the abrasive should refine, not reshape. Let the sheet cut at its own pace, rinse or wipe often, and keep the work area clean. One loose particle trapped under the sheet can create a scratch deeper than the entire 800-grit pattern.

Wet or dry

800 grit is often used wet because water keeps the surface cleaner, reduces loading, and makes the sheet feel smoother. Wet sanding is especially useful on paint, clear coat, plastic, resin, gelcoat, and metal refinement. Dry sanding can still be useful when you need immediate visual feedback or when the material should not be exposed to water.

Use a small amount of clean water, not dirty slurry. If the surface feels grabby or the sheet starts to drag, stop and rinse. Drag is often the warning before a random scratch appears.

What 800 grit cannot fix

Do not expect 800 grit to remove 180, 220, or 320 grit scratches quickly. If you still see coarse lines, go back to the grit that can actually level them, then rebuild the sequence. Skipping directly to fine sanding can make a project look cleaner for a few minutes, but the deeper marks usually return under gloss, stain, or bright light.

This matters on clear surfaces. If the goal is clarity, 800 grit should be one step in a controlled ladder, not the whole repair.

Product and buying notes

For this step, use eQualle 800 grit sandpaper sheets or browse the 800 grit sandpaper collection. If Amazon is easier for checkout, use eQualle 800 grit sandpaper on Amazon.

For wet sanding, keep more sheets than you think you need. A fresh sheet cuts more predictably and is less likely to drag debris. Packs of 25 work well for small finishing jobs; 50 or 100 sheets make sense for repeated coating, resin, metal, or shop work.

Related troubleshooting

If the surface still shows random lines after this step, use the deep sanding scratches guide before moving finer. Finer grit cannot erase a scratch that is still deeper than the surrounding pattern.

Related video

The video below is a related eQualle wet-versus-dry sanding reference. Match the method to the material and keep inspection cycles short.

FAQ

Is 800 grit sandpaper fine?

Yes. It is a fine grit used for refinement, wet sanding, and pre-polish work.

What grit comes after 800 grit?

Usually 1000 grit, then 1200, 1500, or 2000 depending on the finish target.

Can I wet sand with 800 grit?

Yes, when the abrasive and material are appropriate for water. Keep the surface clean and rinse often.

Will 800 grit remove deep scratches?

Not efficiently. Deep scratches should be corrected earlier with a grit that can level them before you return to 800.