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Exterior Redwood Gate Discoloration

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Forum topic by Stewbot posted 06-14-2016 11:34 PM 323 views 0 times favorited 1 reply Add to Favorites Watch
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Stewbot

195 posts in 547 days


06-14-2016 11:34 PM

Im working on restoring several sections of fence/gates that look like the one below. Most of the sections have been well preserved and I’ve been able to lightly sand and coat with spar-eurethane with good results. The image below is one which has severe discoloration at the bottom and I’m looking for suggestions on how to get those bottom boards to match the good ones near the top more closely.

Im assuming I’ll need to either do some heavier sanding,some sort of a chemical wash, or both. I however wanted to post here and see if anyone has a similiar experience with this and some words of advice/suggestions, or perhaps reccomendations for a specific product.

Ultimately I just want to get some of the natural color back which I can then coat over with spar-urethane in order to match the other sections.

I have hit the bottom boards with 80 grit on a palm sander but didn’t feel like that alone was gonna do it. I’ve sanded and restored old wooden surfaces in the past, but haven’t dealt with a color variation quite like this.

-- Hoopty scoop?


1 reply so far

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Kelly

1113 posts in 2407 days


#1 posted 06-14-2016 11:58 PM

My guess is you are getting delamination of the finish and wood where the moisture problem hits hardest. If so, it’s back to raw wood. When you apply future coats, try to get it on all four edges. That will give you a little longer, before the pain starts again.

The main thing needed is to keep moisture out of the wood. It will expand the wood. Since the finish won’t, it’ll crack.

You might try thinning the poly heavily, then applying a little throughout and several times over the day. As long as it soaks it, keep coming back and adding more. When it won’t take anymore, walk away and let it harden. After it’s hardened, apply your top coat. This may limit how much moisture wicks into the wood.

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