One little thing I do is collect and weigh everything that gets taken off / out of a pair of hulls a I go, I usually finish off each nights work with the vacuum cleaner and weigh each nights work up....

it never seems like much weight but over a couple of weeks work it soon adds up, for example I took out 13kilos from TwiceShy's starting weight to finished weight, its always a big supprise as to the volume & weight of debris that the hulls hold !!!

this is JUST the paint weight