#yacht varnish mistake

1 messages · Page 1 of 1 (latest)

hoary yarrow
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So I made a mistake I have thinied yacht varnish with water instead of white spirt any idea what this would do I’ve done it to a wood peice over acrylic paint not just on raw wood

lucid spire
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There's a lot of potentially negative outcomes. Trapped water, failed adhesion, etc. I'd scrape it and fix it now as it's only going to get harder.

hoary yarrow
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Ok how do I do that

hoary yarrow
lucid spire
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Honestly, not particularly likely.

hoary yarrow
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Ah shit so what if I leave it on and add another layer

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Cause it’s very big

lucid spire
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The outcomes range from bad to catastrophic I'm afraid

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I'd guess best case is that the first layer would be cloudy/ugly from the water

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Worst case would be the layer failing and taking the new layers with it

hoary yarrow
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Any chance you’d think I should risk it

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I’m low on time and budget

lucid spire
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That's a very subjective question, but I'm certain that I would not.

hoary yarrow
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What about sanding it back

lucid spire
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Sanding is an inferior removal method for finish, categorically

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it's slower, messier and infinitely harder to do evenly

hoary yarrow
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Right ok thx for your feedback

cosmic apex
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So, in addition to the water issue, what you've done is put a less flexible interior paint over wood that is going to flex a lot due to being outside, then sandwiched it under a flexible exterior coating. It can cause the paint to fail faster than with nothing on top. Both because of the differential of movements between the substrate and the top coat, but also because it can trap moisture in the paint layer.

If you use a good high-quality paint formulated for the task, properly prepped and applied, you do not need the exterior coat.

hoary yarrow
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So what your saying is the paint was a stupid choice to

cosmic apex
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I'm saying you will need to refinish it sooner rather than later.

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Decent exterior paints are guaranteed for 10 years before flaking. Good exterior paints are guaranteed for 20.

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assuming proper prep and application

hoary yarrow
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Right ok so same advice as the guy before scrape it back than reply paint

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But use better paint

cosmic apex
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yup!

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follow the instructions for recommend primer and primer application too