Chemical Guys Phase 5 Polish Fiberglass, Polyester & Gelcoat

Chemical Guys Phase 5 Polish is a hybrid polish that cuts and finishes in a single step on fiberglass, gelcoat and hard paint. Regular car polish falls short on boats, campers, trailers and quads, because these surfaces carry an extra hard top layer that needs a dedicated product. The optical grade micro abrasives remove deep swirls and scratches up to 1200 to 1500 grit sanding marks and restore a clear, deep shine in the same motion. You no longer need a separate finishing product after polishing. Phase 5 works with both a rotary and a DA polisher, so you pick whichever machine you already have in the garage. Professional detailers reach for Phase 5 on bigger jobs like campers and trailers that spent years baking in the sun, where a regular compound does not bite hard enough.

What's inside

One 473 ml bottle of Phase 5 Polish, ready to use with a rotary or DA polisher.

Why this product

• One step, two results: Phase 5 cuts and finishes at the same time, so you no longer need a separate finishing product

• Specific for fiberglass, gelcoat and hard paint: developed for boats, campers, trailers and quads, not for regular car paint

• Works with rotary and DA machine: pick whichever polisher you already have in the garage

• Removes sanding marks up to 1200-1500 grit: takes out deep swirls, scratches and weathering damage in one pass

• Water-based formula: extended working time so you can treat larger surfaces in a single session

How to use

1. Apply a small amount of Phase 5 to a clean cutting pad (Spread it first on a small part of the surface before continuing)

2. Work section by section with the polisher on low to medium speed (Keep the pad flat on the paint and avoid applying too much pressure)

3. Wipe off excess product with a clean, dry microfiber towel (Buff in straight lines for an even, streak-free result)

4. Repeat on heavily damaged spots with a second, lighter pass (Switch to a softer polishing pad for the final finishing step)

Pair it with the Chemical Guys Hex-Logic Heavy Cutting Pad for the best polishing result on heavily damaged gelcoat.