I worked on this (in its original incarnation as the Pyro Soverign of the Seas) with a friend and we did this: Get some linen cloth, fairly dense thread count, and lay it over the plastic sails. Outline the sails on the cloth and cut to match. Stain or dye (for want of a better word) the cloth a pale yellow cream. Roll (furl) the sails up and tie them to the spars. Continue rigging as per (lack of) instructions. The linen is more to scale and furled, the sails look nice. If you want to leave the sails unfurled, you'll have to figure out how they're tied down (we didn't go that far) and also edge the linen somehow to keep it from unraveling. HTH,
-- John ___ __[xxx]__ (o - ) --------o00o--(_)--o00o-------
The history of things that didn't happen has never been written - Henry Kissinger