After putting on 3 filler coats of epoxy on the hull which it needed, I spent 2 hrs sanding the hull smooth again getting rid of all the lumps & bumps etc. When I had finished it was time for a clean up which I do after every stage. I put the sweepings & the contents of 2 sander bags into a plastic bag & I was surprised at how much there was, so I decided to weigh it, just over 0.43kg (0.95lb) & that was all epoxy dust from this one session.
Glen G