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Old 10-07-2010, 12:40 PM   #1
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Paint Failure on Exterior Wood


I have some exposed wood window headers like in this pic (this isn't mine, but the idea is the same): http://gabrielphotographic.com/santa...dow_&_girl.htm

This wood is about 60 years old and was probably oiled originally but now is dry. There are some areas that were damaged on some of the headers that I had to patch with epoxy, so re-oiling them isn't an option anymore (i.e., they don't look too great, bare).

They had been painted by the previous owner with a single coat of acrylic which bubbled and peeled of course.

Last year I sanded them all the way down and repainted with an oil-based primer and then an acrylic topcoat. Both layers have since started to peel away from the wood again.

Since I am going to have to do this every fall until I get it right, does anyone have ideas about what is causing this paint failure and how to fix it? It's good exercise to strip and repaint but I'm not sure I really want to do it every year.

P.S. - I don't remember if it was sunny and/or hot last year when I painted, could that have been the issue? Most of them do face west, and can be really warm and sunny in the afternoon, even in the fall.

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Old 10-07-2010, 09:51 PM   #2
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Paint Failure on Exterior Wood


By all means avoid painting in direct sunlight at all costs. Sounds like maybe the top layes of the wood are too dried out. I would sand off a good 1/16" - 1/8" and repeat the oil primer and latex paint. You can also try thinning the oil with some paint thinner so it penetrated better. Don't be afraid to put 2 coats of primer on if it does soak in real good.

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Old 10-07-2010, 11:38 PM   #3
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Paint Failure on Exterior Wood


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Originally Posted by Matthewt1970 View Post
By all means avoid painting in direct sunlight at all costs. Sounds like maybe the top layes of the wood are too dried out. I would sand off a good 1/16" - 1/8" and repeat the oil primer and latex paint. You can also try thinning the oil with some paint thinner so it penetrated better. Don't be afraid to put 2 coats of primer on if it does soak in real good.
Actually, sand it down again to nothing and use a stain. if you want a painted look, go for a solid oil stain. it's self priming. if you want the grain to show, use a semi trans. anyways, be sure to refinish it in the shade or when the surface temp is cool.
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Old 10-07-2010, 11:48 PM   #4
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Paint Failure on Exterior Wood


Thanks for the suggestions!

I don't want to stain them, just because the repairs in some places are large and unattractive... I don't think they'll look right with stain, the paint hides the blemishes much better. Also, they are turquoise, and my tenants love the color.

I will strip them down again and give it another go.
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Old 10-07-2010, 11:55 PM   #5
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Paint Failure on Exterior Wood


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Thanks for the suggestions!

I don't want to stain them, just because the repairs in some places are large and unattractive... I don't think they'll look right with stain, the paint hides the blemishes much better. Also, they are turquoise, and my tenants love the color.

I will strip them down again and give it another go.
then use a good oil primer like zinssers cover stain:
http://www.rustoleum.com/CBGProduct.asp?pid=222 and then two coats of the best paint available: http://californiapaint.com/paint_p&l.htm
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