I'm replacing stringers in a mid-80s Scarab. It's a solid woven-roving hull. I found delamination in one part of the bottom under the fuel tank that I believe occurred during production. One layer of roving just didn't stick to the previous CSM very well - I can peel parts of it up with a pry bar. I have a decent knowledge of Fiberglass repairs and have been doing the stringers with 1800 double-bias E-glass and epoxy (I know vinyl ester would be fine but for a variety of reasons I prefer epoxy).

My question: I have quiet a bit of bottom thickness to build back up. I'm considering adding 2 layers of Kevlar into the laminate schedule on the bottom for impact resistance. It will wrap up the stringers a few inches but be capped by a mixture of the 1800 plus probably a layer of triaxial. That way I never have to grind any Kevlar. The ocean area where I boat has lots of logs and if I ever punch one at 70 mph I may wish I had the Kevlar in there. Is this a stupid idea ? The cost doesn't bother me that much, I didn't pay much for the boat.

Matt

Waste of Time and Money to use Kevlar , and Epoxy for that matter . The only thing Kevlar in the layup in that old resin bucket will do , is give you
bench racing points .

Thanks guys, I'll stick with the regular glass. It's going to be way stronger than when it left the factory anyway.

Matt