July 31, 20197 yr My £0.001's worth: no experience of working on fibreglass or epoxy, etc, myself other than a little bit of rubbing down of gliders but have spent a lot of time around glider and light aircraft workshops and know that damp is one of the things most worried about for that sort of work to the extent of not doing layup or spraying indoors in a somewhat heated workshop if the air is very humid. Damp during spraying is the no 1 thing blamed for problems with the gel coat on gliders.
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