peter writes:

Has anyone ever used drywall screws (the black ones for screwing
plasterboard - I think you call it sheetrock in the US- onto metal
studs and plastering over) for holding the strips in the right
alignment, instead of wooden dowels and/or plywood cleats, or is it a
really dumb idea?

Have probably used at least 100 lbs of deck screws (coarse thread).

Built the male mold, and endless numbers of jigs, templates, etc.

All of these items would be classed as temporary construction.

Even used them to build the bulkheads which consisted of two sheets of 1/2",
4 ply, CDX plywood glued and screwed together with deck screws and then
glassed over on each side with 2 layers of 24 oz double bias glass and
epoxy.

Those deck screws are buried inside all that glass and resin. It was easier
to grind them flush than to unscrew them and then plug the holes.

They may rust, but I doubt it, and if they do, it's NBD, since they are
strictly now little more than core material.

For your application, I'd probably remove them where possible.

HTH


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland)
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