Glue Spots on Veneer


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"I've been veneering many of my projects for an number of years now and I've noticed that I frequently see glue spots (refer to photo) on the veneer once I remove them from the vacuum bag. The glue seems to be weeping through the veneer..? My procedure when veneering is to apply cold press glue to the substrate, attach the veneer, cover it with a piece of door screen and place it into the vacuum bag. I've noticed this problem occurring on open grain species, especially Mahogany and Walnut. Does any one else have this problem; any suggestions..?

GLUE SPOTS.jpg

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9 hours ago, krtwood said:

I've run into this before.  I wonder if putting a coat of finish on the top face of the veneer before gluing would help so the glue can't soak into the fibers.

You'd want to use caution with this. If the veneer is quite porous, the finish may penetrate to the other side & interfere with the glue bond.

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