I'm surprised no one has mentioned The Honey Guy's Water Blocker Skin Cream. He was at the Int'l Quilt Show in Houston quite a few years ago and I tried it and loved it. I have seen it in several quilt shops since then also.
On Amazon to read the reviews
http://www.amazon.com/Water-Blocker-...ct_top?ie=UTF8 or buy directly on his website
http://www.thehoneyguy.com/category-s/20.htm and