If you are a scratch builder like myself, a plain ceiling tile (2' x 4') makes an excellent building surface. Place your planes on the board, cover plans with wax paper and build away. The tile takes pins very nicely. These tiles are about three to four bucks at your local building supply store.

If weight is not too much of an issue, regular dry wall mud is great for fillets at wing joints, etc. and when thinned down with water can be painted on balsa wood as a grain filler.

If your plan only has the right or left wing panel, coat that section of the plan with vegetable oil, wipe clean and the plan will show through on the opposite side as if it was printed there.

Enjoy the hobby and regards to all.

Magoo