Varnish Problem

[bowesaa]

Mahogany wood side cabins blackening of wood no matter what treatment or varnish put on. Last year applied 7 coats of LeTonkinois which looked great but towards winter blackening appeared again as if water ingress but can't see further evidence of water. Anyone out there had similar problems and managed to resolve them.

Thanks

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[snowleopard]

paint.


yeah, i know that's not what you wanted to hear but that is now my firm policy after many bitter years. i won't tolerate a single square inch of exterior varnish.

those who manage to maintain a good quality finish achieve it by re-coating at least once in mid-season.

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[nordic_ranger]

Yes paint! but try micropore paint. Moody's yachts are finished with this a brand called 'Sikkens' (spelling) I've used it on grab rails and cabin doors it's lasted two years now it comes in neutral or various stain colours wonderful stuff apply three coats. It's not cheap but worth it.

Jim

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[Gordonmc]

Is the blackening spreading from the side or top of the cabin side? If so the culprit will be water seeping from the back, or side. I had a spot at the top corner of a mahogany canin side and eventually found it was coming from a small hole in the (canvas on ply) roof, letting water drip into the joint. Fixing the leak stopped the blackening.
BTW, paint would have hidden the problem. Better to sort it before serious rot sets in.

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[tcm]

yes, i agree. Find the leak.

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[colvic]

Had just the same problem and traced the cause to a microscopic gap in a joint that was letting in water.

We cured it with the aid of a "varnish" from Bondaglass that I saw being applied to the fish hold on a small trawler. The joiner claimed that it would withstand shoveling fish and ice for a year. We bought some and it really did do the trick. We had mahogany cabin sides, hand rails etc. and in the UK it lasted well over two seasons, maintaining a really deep shine etc..

Even in the Med it survived for more than a year at a time and quite a few people brought it back for use on their boats.

Last year, the only shop I could get it from was in Brixham, Devon. Look up decorating supplies in Yellow pages and one of them will be the shop. They posted me a litre tin overnight.

Well worth the trouble of getting hold of it.


Phil



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[slowboat]

check your coachroof carefully if the timbers not cracked thats where it would most likley be getting in and then running down in somewhere. Dont paint, you can't see the problem untill its too late, people who moan about varnish dont know how to use it.......

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[slowboat]

check your coachroof carefully if the timbers not cracked thats where it would most likley be getting in and then running down in somewhere. Dont paint, you can't see the problem untill its too late, people who moan about varnish dont know how to use it.......

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