I can't say enough good things about Kinesys spf 30 Performance Sunscreen. (You can get it from REI I believe... or in Canada from MEC).

I've tried probably 15 different kinds and Kinesys is bar FAR my fav - absolutely NO residue or stickiness, spray's on super easy, works incredibly well, and even smells alright.

Every person I've ever let try it out says its the best stuff they've used.

Huge thumbs up from me.