If I'm reading the original post correctly, gfuhr is asking about the Revell plastic kit. I started a thread a while back on the model I built from it. Here's the link to that thread: cs.finescale.com/.../1673852.aspx .
In that thread I explained how I made the sail out of paper. It's really simple; all it requires is some high-quality resume paper, some paint, and a roll of Scotch Magic Tape. (Resume paper, at least here in the U.S., is a rather stiff, cream-colored paper that has a visible weave, which looks remarkably like woven cloth on a small scale.) I'm quite satisfied with the result - and it's held up well; I don't remember just when I built the model, but it's been several years, and the tape shows no sign of coming loose. I'm comfortable recommending that technique.
Good luck! That Revell kit is an excellent one.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.