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"Dry" spot when using brush lacquer

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Forum topic by Bob Areddy posted 01-14-2014 08:56 PM 634 views 0 times favorited 5 replies Add to Favorites Watch
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Bob Areddy

192 posts in 2869 days


01-14-2014 08:56 PM

Topic tags/keywords: lacquer lacquer problem dry spot finish

This is driving me nuts. Trying to coat a panel, and about a dime size spot isn’t taking the lacquer (on mahogany). I brush the lacquer on, everything looks fine, I come back, and it looks like the lacquer absorbed into the wood like a sponge. This is after 5 or 6 coats!

What’s the problem?

-- --Bob http://www.areddy.net/wood


5 replies so far

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tefinn

1222 posts in 1904 days


#1 posted 01-14-2014 09:11 PM

Do you have any type of ridge around the spot after the lacquer dries? If so, it sounds as if there might be some contamination (wax or silicone maybe) that’s preventing it from adhering to the wood at that spot.

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.

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lumberjoe

2893 posts in 1715 days


#2 posted 01-14-2014 09:16 PM

Is it near a glue line?

-- https://pinepointwoodworks.wordpress.com/

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Bob Areddy

192 posts in 2869 days


#3 posted 01-14-2014 11:36 PM

It is near a glue line, and there is no ridge around it. At least, not a big one.

I sanded this panel through my home made panel sander, so I can’t believe there would be any residual glue on it.

-- --Bob http://www.areddy.net/wood

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Bob Areddy

192 posts in 2869 days


#4 posted 01-27-2014 02:19 PM

I ended up sanding the whole thing down again and it turned out fine.

-- --Bob http://www.areddy.net/wood

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lumberjoe

2893 posts in 1715 days


#5 posted 01-27-2014 02:48 PM

Always wipe it down with mineral spirits or some kind of solvent that doesn’t have a lot of water (alcohol is a bad choice). Any residual glue will be immediately apparent. I’m always surprised at the little glue spots or the glue thumb print left behind after a thorough sanding (especially on porous species like mahogany). I like to do the mineral spirits show-and-tell after sanding with the lower grits so I don’t need to start over.

-- https://pinepointwoodworks.wordpress.com/

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