Menzerna Heavy Cut Compound 400: Specifications and Safety Notes
At a glance
- What it is: A heavy-cut one-step polishing compound, previously sold as Menzerna Fast Gloss 400 (FG400).
- Key facts: Described as removing sanding marks and relatively heavy weathering, scratches and swirls while finishing to a high gloss; 250 ml and 1 litre; £14.95 for 250 ml (UK retailer).
- Suits: Detailers correcting moderate to heavy paint defects in one step.
- Skip if: You are a beginner; strong compounds can thin paint if misused.
We haven’t tested this product ourselves. This page summarises one UK retailer’s listing, checked 19 October 2026. We could not open a Menzerna page.
Specifications
| Specification | Detail | Source |
|---|---|---|
| Product | Menzerna Heavy Cut Compound 400 (SKU MHC400250 for 250 ml) | [1] |
| Former name | Menzerna Fast Gloss 400 (FG400) | [1] |
| Claims | Removes sanding marks and relatively heavy weathering, scratches and swirls; finishes to a high gloss; one-step polishing | [1] |
| Retailer ratings | 8 out of 10 for abrasiveness and 8 out of 10 for gloss (the retailer’s own scale) | [1] |
| Sizes and price | 250 ml and 1 L; £14.95 for 250 ml; 20 in stock on 19 October 2026 | [1] |
| Machine and pad advice, ingredients | Not on the page; not verified | n/a |
What owners report
We have not reviewed owner feedback for this product.
Known issues and safety
Recall check: we searched GOV.UK product safety alerts, reports and recalls (Office for Product Safety and Standards) for “menzerna” on 19 October 2026 and found no results [2]. Check the list again for the exact product.
We did not review a safety data sheet. Use it in a ventilated place, wear gloves and eye protection, follow with a finer polish for the best finish, and test on a small area first.
Questions people ask
Is it the same as Fast Gloss 400?
The retailer says it was previously called Fast Gloss 400 [1].
How strong is it?
The retailer rates it 8 out of 10 for abrasiveness on its own scale [1]. That is not a standard measure.
Which machine should I use?
The page does not say [1]. Check the label.
Alternatives
- Sonax Perfect Finish: A finishing polish. See our separate page.
- Other polishes: See our car polish hub.
Our verdict
Based on the evidence, this suits experienced users who need a heavier cut in one step. We could not confirm machine advice or ingredients. This is a research summary, not a test result.
Sources
- Menzerna Heavy Cut Compound 400, Shop n Shine (UK retailer listing), shopnshine.co.uk. The page shows no date. Checked 19 October 2026.
- GOV.UK search of product safety alerts, reports and recalls, Office for Product Safety and Standards, gov.uk. Searched 19 October 2026.