ckurak
Posts: 107
Joined: 2006-10-28
Location: Florida
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Tony,
I use blue tape for assembling the pieces, but not for glue-up. During the gluing process I use veneer tape. The blue tape will leave indentations in the veneer. What most likely happened was that the glue underneath the veneer was squeezed out. This may not sound logical at first, but I believe that is what happened. (Someone please correct me if I have this wrong.)
Sanding the veneer may or may not help remove the indentations by bringing the surrounding veneer down to the same height as the indentations.
To use blue tape to assemble the project, I apply the blue tape on the back (glue-side) of the veneer. Then, I apply veneer tape on the "show side" (visible side when the project is complete). When the veneer tape dries, I remove the blue tape then continue on with the glue-up process.
Adding another layer of veneer over an uneven surface will probably not solve the indentation problem. The low points will simply telegraph (show through) to the top-most layer. Your choices might be a) sanding the veneer down to perfectly smooth (no indentations), or b) starting the project with new materials.
For taping a glue-up package together, a common method is to use clear, thin packing tape. This is much thinner than blue tape and avoids the indentation issue.
Using the plastic sheeting to protect your bag was a very smart move. When using a caul, I usually place the plastic sheeting between the veneer and the caul. This protects the caul and the bag at the same time. Be sure that your caul does not have any sharp edges that might puncture the bag when it is under vacuum.
Look at this as a great learning experience. We have all done things like this, and probably a lot worse. I know I have. 
Good luck,
Charles
PS: Welcome to the forum.
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