Last fall I picked up an Old Town sailing rig that I think dates from the 1960's. The mast is about 6'6" and the boom and spar are both about 10'6". I would therefore assume the lateen sail to be about 45 sq. ft. My question is how to care for the cotton sail. It is in pretty good shape, but somewhat stained from storage. Should I launder it, dry clean it, treat it with anything, or just leave it alone? It is quite usable as is, but would look better cleaned up. Any helpful suggestions would be most appreciated.