Don Stephan
Posts: 825
Joined: 2003-07-18
Location: Cincinnati, Ohio
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The comment regarding dying Unibond was probably mine. In that instance I was veneering wenge, which is a very open pored wood. I wouldn't expect any need to consider dying the glue when using maple - instead, keep the glue as light as possible.
I have used Transfast and Transtint water based dyes (from Homestead Finishing, Rockler, Woodcraft, ...) over vacuum pressed veneer and never had any spots that wouldn't take the color due to glue spotting. Normal sanding of the veneer to remove the paper and level (80, 150, 220) and then wet thoroughly with damp sponge. When it dries any residual veneer tape glue will show up on the joints. I remove with 220 grit, wet again, and repeat as needed until no more residual veneer tape glue. (If working with cherry or oak, I use distilled water to minimize chance of iron/tannin staining from iron particles in tap water).
Practice on test veneered panels first, as always. Good luck.
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