I almost used up this pile of scrap, so my waste is almost nil. That is the good thing about this foam, you can join it for details like these bow caps.
Before I fair the floats I need to add a sacrifice bow, or a bumber. I use scap pieces of foam and glue them together with polyurethane glue ( foaming glue ?). It makes the same material as the foam, very easy to plane with the power planer.
Here the bow is fitted and faired ( bog not sanded yet). I then need to glass it.
I also cut the round hatches open a made the holes for beams. Note they are offset a bit aft.