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Gray Maple

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Forum topic by Woodbum posted 12-15-2014 09:21 PM 683 views 0 times favorited 5 replies Add to Favorites Watch
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Woodbum

728 posts in 2526 days


12-15-2014 09:21 PM

Has anyone ever had spray shellac turn maple gray? I sealed a maple box parts with Zinsser spray shellac prior to glue up, and when it dried, the maple had a gray, muddy tint to it. Where I had taped off the gluing portion of the tenon joints, the maple was still bright and light colored. Any clues from anyone out there? Thanks

-- "Now I'm just another old guy wearing funny clothes"


5 replies so far

View UpstateNYdude's profile

UpstateNYdude

694 posts in 1443 days


#1 posted 12-15-2014 09:31 PM

My only guess is possibly more tannin than is normal in maple and something in the shellac you had caused it to come out, beyond that I couldn’t venture another guess.

-- Nick, "Choking to death on bacon is like getting murdered by your lover." - JG

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Woodbum

728 posts in 2526 days


#2 posted 12-16-2014 12:15 PM

Thanks. I’m pretty clueless on this too.

-- "Now I'm just another old guy wearing funny clothes"

View Sactomike's profile

Sactomike

19 posts in 743 days


#3 posted 12-16-2014 01:46 PM

Temperature and ambient moisture can do some very strange things to clear finishes. The gray makes me think of moisture problems.

View Lumberpunk's profile

Lumberpunk

323 posts in 1797 days


#4 posted 12-16-2014 02:29 PM

It kinda sounds like blushing, which I have encountered with Laquer before and is caused by moisture in the wood. I’ve also heard that premixed shellac has a shelf life, could your can be out of date?

Get some methyl hydrate or denatured alcohol and wipe it all off, resand, refinish.

-- If someone tells you you have enough tools and don't need any more, stop talking to them, you don't need that kind of negativity in your life.

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Andre

1019 posts in 1266 days


#5 posted 12-16-2014 03:59 PM

Too wet, check the moisture in the wood, might even be too much humidity in the air?

-- Lifting one end of the plank.

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