Presta Super Cut Compound for Gelcoat & Fiberglass — 32 oz, Removes P800 Grit and Heavy Sand Scratches

If your boat, RV or fiberglass surface shows heavy sanding marks or chalky oxidation, this compound is built to restore smoothness and clarity before finer polishing. It works with high-speed rotary buffers for fast material removal and avoids waxes, fillers or silicones so subsequent polishing and coating steps bond cleanly. The water-based formula also makes cleanup simple and reduces solvent odors compared with solvent-heavy alternatives.

How quickly will this remove P800 grit and heavy sand scratches?

Presta Super Cut Compound is formulated for aggressive cutting, so it removes P800 and finer sanding marks in far fewer passes than light polishes. Using a high-speed rotary buffer and the correct cutting pad, you can expect visible improvement after a single area pass.

• Works best with high-speed rotary buffing machines for rapid cutting.
• Removes deep sanding marks without relying on fillers or waxes.
• Requires follow-up with finer polish steps for gloss restoration.

Is it safe for gelcoat and fiberglass surfaces?

Yes — the formula is intended specifically for gelcoat and fiberglass. It aggressively abrades and lifts oxidation but is not intended for soft paints or thin clear coats; always test in an inconspicuous spot first.

• Designed for gelcoat and fiberglass applications only.
• Avoid use on soft automotive paint or thin factory clears without testing.
• Perform a small test patch to confirm desired cut and finish.

What equipment and pads should I use with this compound?

Presta recommends using high-speed rotary buffers paired with a medium- to heavy-cut foam or wool cutting pad to maximize material removal. Control speed and pressure to avoid overheating the surface and follow with finer polishing steps to refine the gloss.

• High-speed rotary buffer yields the best cutting action.
• Medium-to-heavy cutting pads (foam or wool) accelerate scratch removal.
• Reduce speed/pressure on edges and thin areas to prevent swirl heat.

How should I clean up and prepare for the next polishing stages?

The water-based formula wipes away easily with a microfiber towel and mild soap and water, leaving no wax or silicone residues that might interfere with subsequent polishes or sealants. After cleaning, inspect the area and proceed to a fine polish and protectant for deep gloss and UV protection.

• Wipes off cleanly with microfiber and water-based cleaners.
• No waxes, fillers or silicones to block adhesion of top coats.
• Follow with a medium polish then a finishing polish or sealant for best results.

Who is this for: Presta Super Cut Compound is aimed at marine detailers, boat owners, boatyards and repair technicians who need a powerful, fast-cutting product to remove P800-grade sanding marks, heavy abrasion or oxidation on gelcoat and fiberglass. It’s ideal when you plan to restore surface smoothness quickly and then move to finer polishing and protective coatings.