Would there be any benefit in sheeting a foam/lit-ply plug with 1/16 balsa like what Magne did? I.E., to help stiffen and/or produce a better surface for glassing?
Possibly...depends on the situation. IMO, foam sands easier than balsa, and I can lay down glass over a 'difficult' surface much easier than balsa. If you need more surface strenght, just add more glass.
-Tom