Originally Posted by
Kevin Jenness
I've done a number of torsion boxes like yours with cauls and clamps. I sandwich the work between 3/4" mdf cauls and 5 or 6 pairs of 2" x 4" hardwood cauls, so only 10 or 12 clamps are needed. The cauls are slightly curved or flat with sandpaper pads at the center and quarter points for the same effect. You don't need bone crushing force, just enough to get the parts in contact. Epoxy or ppr glue will give plenty of working time, though I have used yellow glue when working with a partner. You can also use clamp with vacuum by sealing a sheet over the torsion box and down to a benchtop underneath.
Second that. No different than veneering large-ish panels with PPR as I have done many times. 2 X 3/4" MDF as Platen, clamps every 6" on hardwood cauls.
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