I work with a dermatologist and we recommend titanium oxide or zinc oxide. The Parsol stuff doesn't absorb as much UVB. Throw all sunscreen away at the end of the season and buy new - just like prescriptions there is a shelf life of ~1 year.

Kinesys is a good product, but it contains Parsol: http://www.kinesysstore.com/default.asp
We do sell it at the office because it's one of the better spray-ons and I use it on the bike and boat.

2007 America, Phantom Black/Sunset Red Deposit down on 2010 Thunderbird - can't wait for it!