In small tanks of 20 gallons or so, I don''t put a baffle unless it is long and skinny, but of course, once you start growing in size, OR if the tank is put under a berth, I put in baffles. One reason is to keep down noise, another is to limit sloshing so your
fuel guage has a chance to tell you how much you really have.
If you do a google search on
line for fiberglass cloth, you''ll find a place on Florida''s east coast, in Ft Lauderdale, I think. I forget. I order from them on
line or over the phone, and they ship to me. Anyway, they have everything you need.
The resins are inexpensive and work fine. West is great stuff, but really pricy compared to conventional layup resins. I have done all major building on my boat using both. West for wood and wood/fiberglass assembly and adhesion, and polyester and vinylester for large jobs, such as the hull and tanks.
By the way, when it came time to actually build in
fuel tanks in the bottom of my aft quarterberth areas, I got all the materials, got the areas ready, screwed up my resolve, and suddenly said ''Screw this'' and bought tempo plastic tanks for tis area.
Why?
Because I simply couldn''t be sure I could work in that small area with the confidence that the tanks could survive a really rough passage while being half full. The last thing in the world you need is 50 gallons of diesel
fuel sloshing around your bilge and no engine in a stormy sea. It was simply too risky. If I could have built the tanks on land, then installed them, fine, but no way. I couldn''t get them into the boat, so I had to back off and go for factory tanks. All other tanks, though, are easy. Three water tanks and a
holding tank.