Hi Phil, you're right about the thick, flat wing. Doesn't look right, but its a concession to flight performance. The "droop" is an optical illusion caused by the gently curved leading edge. Considering the fuse. is so scale I was tempted to build a thin dihedralled wing to match it, but performance would have suffered.
The wing covering is indeed doped Silkspan. The fuse. is talc/dope mix sanded smooth. Paint is Tamiya spray can matt RAF colours, finished with a few coats of oilbased polyurethane clear matt. I printed the decals on my inkjet using MS Word........John