Hi Dave, Absolutely!

Use a full layer over the entire boat. Add a second layer to the bottom, and maybe a third layer full-length over the keel. Maybe even a FOURTH! layer on the bottom of the stems where it really wears most.

I guess it all depends on how thick of glass you're using--4 or 6 oz. would be about right for my recommendations. If you're using 8 oz., maybe skip the all-bottom layer and just do the 3rd and 4th layers.

I have 4 layers of glass over the bottom of my stems. I added this after hitting a "loving" submerged rock, gouging 1/4" into the stem. No problems anymore, and dragging hasn't done much damage to the stern either.

Lee's suggestion for polyester is a good one. Polyester or kevlar would make great "rub" strips on the keel, fore and aft.

Shawn

> I am planning on building a new boat. I now live in the south and am
> expecting to take some trips in shallow tidal flat areas with lots of
> oyster beds. I know this can be real nasty on boat bottoms and am
> wondering whether or not I should reinforce bottom with an extra layer of
> fiberglass. Another option might be to use some thicker fiberglass, or
> maybe not sand the fiberglass quite so thin. Would double glass be useful.
> If so, how would I do this. I was thinking one layer on bottom, then sand.
> Then another draping layer over bottom and sides. Thanks for any
> suggestions.

> Dave