How to avoid dark areas when varnishing teak? - SailNet Community

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Old 03-07-2013
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How to avoid dark areas when varnishing teak?

I need to add a few layers of varnish to my toerails. Most of the existing varnish is sound and will be lightly sanded. On some small areas the varnish had lifted, so I removed the loose stuff with a carbide scraper, leaving some areas down to bare teak.

In the past I've found that, where the varnish is applied onto bare teak, the wood will turn much darker than elsewhere.

Is there a way to avoid these dark patches where the bare wood was, and get a uniform appearance?
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Re: How to avoid dark areas when varnishing teak?

Mark try a little TSP in solution. It should take the discoloration out, and lighten the area. you just have to rinse real well and dry after
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Old 03-08-2013
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Re: How to avoid dark areas when varnishing teak?

Are you sure you aren't just noticing the difference between varying thicknesses of varnish? As you build the varnish layers, the thicker gloss layer can make it appear lighter, even though the wood below it isn't.
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Re: How to avoid dark areas when varnishing teak?

Not sure really...I've got some TSP though so we'll see what happens
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Re: How to avoid dark areas when varnishing teak?

If you scraped right down to bare wood, you may have burnished the grain and kept it from soaking the first coat. Best to hit it with some sandpaper and be sure that first coat is highly thinned out. You might even just prime all the bare spots with 50/50 first, followed by a couple of layers of 25%, then go back and sand everything out as even as you can get it, before starting to build.
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Re: How to avoid dark areas when varnishing teak?

Exactly what Minne said - I do that all the time with my teak toerails!
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