koch chemie gelcoat heavy cut gh8 01 grobe schleifpolitur marine linie Kühlbox The cleaner lifts that layer

The cleaner lifts that layer while the care product brings back the natural finish – for a visibly more matt result

A universal towel often leaves faint loops or fibre marks on the smooth glass that read as a light shimmer in the light

That combination gives you a particularly safe way to polish

No long dwell needed — the prep effect comes from the mechanical work as you apply

peaking after 3–4 days

koch chemie gelcoat heavy cut gh8 01 grobe schleifpolitur marine linie Kühlbox The cleaner lifts that layerHeavy cut compound for gelcoat and boat paint Koch Chemie Gelcoat Heavy Cut "Gh8. 01" Koch Chemie Gelcoat Heavy Cut "Gh8. 01" is what you reach for on badly weathered gelcoat and boat paint. This heavy cut pulls out deep scratches, chalky oxidation and scuff marks the kind fenders leave behind and lays down serious gloss in the very first pass, even on dark surfaces. It's silicone oil free, so you can keep working it for ages without it burning in,