RE: Japanese silk tissue question
Patrick, the tissue will not have any dope already on it. Esaki (Japanese) tissue that is distributed by SIG has a shiny side and a dull side. The shiny side goes to the outside, but it is not pre-treated with any dope. What SIG means in their description is that you use dope to apply it. Their words are confusing and misleading, but the tissue has no dope on it.
One tip:If your wing has dihedral, cover the bottom first. When you cut the piece for the top of the wing, cut the edge that will be attached to the dihedral joint with a convex curve. This will prevent you from getting a sag in the tissue near the center of the wing. See pic below: