menzerna Heavy Cut 400 abrasive one-step polish 250 ml — strong cutting power, high-gloss finish

menzerna Heavy Cut 400 is a professional-grade, one-step abrasive polish that removes moderate scratches and swirl marks while delivering high-gloss finish in a single pass.

Built for body-shop technicians and detailers who want fast correction without sacrificing appearance, this formula blends aggressive cutting power with notable gloss. It was previously sold as Fast Gloss 400 and now comes in a compact 250 ml (8 oz) bottle ideal for spot repair or full-panel correction. The emulsion works on both rotary and orbital polishers when paired with the appropriate pad and technique.

How quickly does this polish remove scratches and defects?

Heavy Cut 400 is formulated for medium-to-heavy defect removal and can substantially reduce light scratches, sanding marks, and heavy swirl patterns in fewer passes than milder polishes. Results depend on paint hardness, pad selection and machine speed, but many users report visible correction after the first pass.

• Aggressiveness: cut rated 8/10 for strong material removal
• Recommended rpm (rotary): start 800–1,500 rpm, finish 1,800–2,000 rpm
• Orbital use: use lower-to-upper speed range with steady pressure
• Pair with a slightly softer finishing polish to refine gloss if needed

Which tools, speeds and pads work best with this product?

This compound is compatible with both rotary and dual-action machines; adapt speed to the stage of correction. Begin at moderate speeds to distribute product, then increase to break down the abrasive; finish at a higher speed to boost gloss and remove haze. Use a firm cutting pad for heavy defects, and switch to a softer or microfiber pad to refine edges.

• Rotary: 800–1,500 rpm to start, 1,800–2,000 rpm to finish
• Orbital: operate through the lower to upper rotational speed bands
• Pad types: firm-cut pads, then softer finishing pads for gloss
• Technique: overlap passes and use moderate, even pressure

What kind of finish and longevity can I expect?

Although formulated to correct aggressively, Heavy Cut 400 also delivers a strong reflective finish—rated 8/10 for gloss—so panels do not need extensive reworking to look showroom-ready. The initial result is a high-sheen surface; long-term protection requires adding a sealant or wax after polishing.

• Gloss level: high, rated 8/10 for mirror-like shine
• Correction-to-gloss balance: designed for one-step efficiency
• Post-polish protection: apply sealant or ceramic coating for durability
• Suitable over factory clear coats and refinishes with care

How should I use it safely to avoid damage?

Use correct pad, machine settings, and light-to-moderate pressure to prevent excessive clear coat removal. Work in small sections, keep the pad clean, and always test on an inconspicuous area to confirm compatibility with the paint. Wipe residue with a clean microfiber cloth and inspect under good lighting.

• Patch test an inconspicuous area first
• Keep pad speed and pressure appropriate to panel and paint hardness
• Clean or rotate pads frequently to avoid glazing
• Follow with protection (sealant/wax) to lock in results

Who is this for: menzerna Heavy Cut 400 is aimed at professional detailers, body-shop technicians and experienced enthusiasts who need a fast, effective polish for medium-to-heavy defects while preserving a high level of gloss. If you want aggressive correction with one-step efficiency for spot repairs or full panels—and you have the right machine and pads—this 250 ml bottle gives concentrated performance in a compact package.