As far as keeping resin out of locknut or nutplate threads while you're
glassing, you can stand them up in a row on some waxed paper and melt canning
paraffin or candle wax into the threaded parts before you install them. Resin
will not stick to wax. After they are in place and the resin is hard you can
auger the wax out with a dental pick or just screw the fastener in and it will
push the wax out the back, if the back is open.
Be careful with wax though. The thing that makes it so good for keeping resin
out, will also doom you from ever getting good adhesion when you are trying to
get a good solid resin joint or glassing over something.
Oscar ZunigaMedford, OR