Re: question about peanut butter
Rocky, the term "Peanut Butter" refers to the consistancy of the epoxy or polyester putty foks use to "Bed" the stingers. The putty fills any voids in the joint between the hull and te stringer, and then hardens to help stick the stringer to the hull. You can use several layers of saturated glass cloth or mat to do the same thing, provided the voids are not too large.
If the voids are large, either the hull is not true, or the stringer is not made precisely. If it is the latter case, the "peanut butter" may be necessary.
I would use poylester resin and chopped glass cloth or mat for the bedding agent, if I needed it. I normally do not have large voids so I use 2-3 layers of saturated glass cloth to bed the stringers.