If you fully cover the wing with Bi-Di (heavy) you may not even need to think about
using fiberglass spars.

There are many different ways to do wings and I can only speak for what I have seen
and how I go about doing a wing (I am NO expert)

Here is what I do, 5 min epoxy wing halves together Gorilla/Ultimate glue the 1/8
fiberglass spars into their slots (top & bottom) and wrap the spar area with Bi-Di
allowing at least a foot of overlapwhere the 2 ends cross )1 piece comletely around
wing, not one on piece top and one piece on the bottom. Put some long flat
weight on it so the glue does not foam and cause an bump on your airfoil, let it set
overnight.
Bi-Di leading and trailing edges with one contiuous piece each.
Cover with coloured tape after ailerons are installed.

Don't forget to dust wing with Super 77 before applying the Bi-Di or coloured tape.


Martin