Best GRP Polish

[Chris]

Boat Marine 3M Gelcoat Cleaner & Wax - hull gelcoat grp protect polish 500ml | eBay

Anyone used this 3M stuff?

Its not for scratch removal just to bring back the shine..

Or there is this

Crystal Glo Marine Treatment Acrylic Boat Yacht Hull Gelcoat Gloss Polish 1L | eBay

or

Meguiars Boat/ RV Polish Polish M4516 | eBay

[Nos4r2]

If it's gone dull, you need to use an abrasive/scratch removing polish to bring back the shine before you wax it/polish it with anything like that.

[willk]

I used 3M Machine Polish when I couldn't find anything else - it produced a lovely glossy finish and was very easy to work with.

I'm not sure how abrasive it is, but it lifted my GRP to "new" look. It had been very dull beforehand.

I sealed it afterwards with car wax.

[Dirk Diggler]

I use this on all my mouldings, really easy to use with a superb finish. Compounds : Fibreglass kits supplies, Epoxy Polyester Resin, Gelcoat, Acetone, AS Composites UK

[Mollers]

3m Finesse it compound applied with a machine polisher/supermop. 3m Finesse hard wax to finish. The result will be 'as new'.

[Neville]

Several common abrasive systems can be used, some such as Farecla Automobile range (G3, G6 etc) are more or less the same as the Farecla marine range (Profile 100, 200 etc) and there are loads of other similar products available. The main thing with an abrasive is to use the correct one , and if the scratches require a coarse abrasive then they must be followed up with a finer compound.

Most important after doing all the cutting back work (and often forgotten) is the wax application. Several coats are best, the wax does not require to be anything special, simple GRP moulding hard wax will do, but it must be left on to dry before buffing bac and several coats applied.

This is bac breaking work and there is no easy way to do it. However if this is done the Gelcoat will be back like new and it will be protected from oxidization by the wax that you have put on.

Good luck !