Which Paint

[retsina]

I will be painting the top sides soon and I need to make a decision on the type of paint to use. The Yacht is GRP 32 ft and i will be using the roller and brush. Has anyone tried JOTUN Hardtop XP two pack polyurethane.

Is enamel paint like the International Perfection better than the two pack polyurethane?

 

[BAtoo]

Just done my keelboat with this. For a first time use I am quite satisfied, especially considering it was a bit cold when painted. Better finish than toplac which I have used before; never used perfection. Seems quite a tough paint and I may just give a final rub down and another coat. The agents - Shepherd MArine are very helpful.Preparation is all.
Value for money is good.

 

[impact30]

I have tried both international perfection and jotun hardtop. International was easier to put on, I got an excellent finish with a closed cell foam roller and it lasted 5 years before some chalking. I never polished it and suspect that if I did it would last another 5.
I had to thin it to apply and sand between coats to flatten. I put 4 coats on to achieve good coverage over primer.
Jotun was a fraction of the cost! I started applying with roller but failed to get a satisfactory finish. Sanded flat and switched to spray. Needed to thin a lot to get any result. Inexperience in general did not help. Got a good finish in the end but felt I could have done with a guinea pig to perfect my technique.
Also I think Jotun is aimed and formulated for application by airless spray.
I think if I was going again I would use Jotun for cost, especially if its a big boat. I would thin it until I got a reasonable application with a roller and then assess the finish. I will be trying this later when the weather is warmer. I applied in October and got no chalking or any ill effects of cold weather.
If it was a smaller boat where cost may not be such an issue I might favour International but I shall know more later in the year.
PS I also used Jotun antifouling which worked out very well.