Painting a new plywood pram dinghy

[ianc1200]

I'm close to finishing a 9' 6" version of the Woodenboat Nutshell design of pram dinghy. I will epoxy seal the boat inside and out, on the outside with woven glass material. Having done that - how do I paint it? Should I be looking at a primer then paint two pack polyurethene? I've looked (a bit) at the Jotun range of two pack paints but getting confused by the many alternatives they offer.

 

[Tranona]

Very nice. From a protection point of view a simple one pot will do. A 2 pot is harder and will resist abrasion better and if done well will likely be cosmetically nicer. Just choose one system and follow the instructions. Personally I would use Toplac. 2 undercoats and 2 top coats. That is because I have always had good results so why use anything different?

 

[ianc1200]

I did a 7' 7" version back in the late 80's - early 90's, encapsulated in West then one pot, but the paint never worked well and came off continually, so that's why I thought I would try and do something better this time. (that one was built using Jewson's "marine ply" which wasn't a good choice on my part)

 

[DJA]

I did a 7' 7" version back in the late 80's - early 90's, encapsulated in West then one pot, but the paint never worked well and came off continually, so that's why I thought I would try and do something better this time. (that one was built using Jewson's "marine ply" which wasn't a good choice on my part)

Hi Ian, on Seapie I protected using 5 coats of epoxy then International Prekote, quite a few coats to take out any imperfections sanding back between coats, final coat I mixed with a small amount of the topcoat. Then 2 coats of Toplac, I used a matting additive on the Toplac to give a satin finish. Seapie is 8 years old now and out all year and the paint is holding up well. Inside I used West 207 and finished in a matt polyurethene varnish on the epoxy and Woodskin on bare timber. Welcome to take a look, she has been moved because of the picnic table, she's alongside the tap.

 

[ianc1200]

Hi Ian, on Seapie I protected using 5 coats of epoxy then International Prekote, quite a few coats to take out any imperfections sanding back between coats, final coat I mixed with a small amount of the topcoat. Then 2 coats of Toplac, I used a matting additive on the Toplac to give a satin finish. Seapie is 8 years old now and out all year and the paint is holding up well. Inside I used West 207 and finished in a matt polyurethene varnish on the epoxy and Woodskin on bare timber. Welcome to take a look, she has been moved because of the picnic table, she's alongside the tap.

Thanks Dan, just had a look, paint is in exceptional condition.

Is the other Nutshell based at Titchmarsh again - I saw her in the dinghy park a couple of weeks ago.

 

[DJA]

I think so, tender to the blue Shrimper berthed on the upstream pontoon

 

[MisterBaxter]

TA Paints do very good one-pot paints which I've used on a similar project and been very happy with. When I last looked they were a bit better value than some marine paints.

 

[ianc1200]

Thanks for the replies. I emailed Jotun Paints but got a very poor response. The lady at our chandlery at Titchmarsh emailed the local International rep and he replied;

1) Abraid/ rub down west system with 180 or 240 sandpaper
2) then apply 4 coats of One Up. DO NOT SAND IN BETWEEN THESE COATS.
3) BUT do sand the last coat of one up with 400 then clean off any sand or dust residue with a dry cloth.
4) Apply TWO coats of Toplac Plus but EACH COAT must be thinned with 10% of Thinners 100.

Close to Dan/DJA's reply, and I'm going to do as suggested by the rep.

 

[DJA]

Hi Ian, if you dont sand between coats make sure you apply the coats within the period stated by International to ensure a chemical bond. If the finished flattened epoxy surface has any imperfections these will be shown by the One Coat, this is the reason a sanded between Prekote, to take out these imperfections before building up too much paint thickness.......although I did get a bit carried away! Maybe worth having a look after the first coat of One Coat and decide if it needs sanding back or not.