Join Date: Aug 2013
Thanked 19 Times in 19 Posts
Rep Power: 4
Re: Preparing Cape Dory Typhoon for deck paint
Usually GRP decks have an antislip pattern, surface is unintentionally very uneven. Sanding with a block will then have to take that down. Huge job. You would need a maschine to do that.
Pity to take away the anti-slip structure as well.
An alternative is to sand somewhat, to remove the highest peaks in the antislip pattern. Then sand with ... sand, or something similar, and a brush. The rugg the surface in the valleys in the anti-slip pattern, without making everyting even.
When you fell enough is enough, then remove all dust. Vaccum clean, wash with a detergent and lots of water.
Apply generous amounts of aceton or other similar strong solvent. To remove all dirt and oxide and whatever could be left.
Paint with first a primer and then some other paint. Imortant to use a complete paint system and not mix. 2-component uretans are very strong, but also very glossy - consider adding something that removes the glossy finish. Deck color: not too white, not too dark.
I have used Interdeck (Interlux 1-component paint with antislip). Has worked fine, much better than anticipiated. Intended just to last for 1-2 year, still fine after 5 years (OK, I do not have the Florida sun here). The advantage with such a simple paint system is that it is easy to apply a new layer when I feel for it. Anyhow, I agree with the recommendations for a 2-component paint system - much more durable.
It may be of importance for you to be able to get some more paint in the same color later on. From that aspect, Interlux is not the best choice.