: I know that a lot of new fiberglass boats suffered from blisters. I
: don't know if they fixed that issue or not. But a few small
: bumps are not going to slow a boat down noticeably. If you race,
: that may be another story as you want every advantage you can
: get.

: I have read that a lot of scratches like are so common on
: Tupperware boats can have a noticeable effect. It just happens
: slowly so the owner don't notice it. NO first hand experience
: there.

: What I found when I ran the figures on Basic Boat was that at 2 lbs
: of resistance you lost 1/8 of a mph for every 25 lbs extra.

Most relatively cheap fiberglass boats are built of also cheap polyester resin, sitting full of water, likely for years is the cause of the bumps, it's call blisters but it's really osmosis. The fiberglass laminate is actually fairly porous, though on a microscopic level, it'll let water vapor pass thru it and tends to hold the water in the laminate and it starts breaking down. Easy fix is to keep it dry and leave it in the direct sun, though it'll take quite some time for it to dry the glass, perhaps months.

Bill H.