How many cans of spray sunscreen?

I would say three. But I like to be on the safe side. While vacationing in Phoenix in Aug we spent the entire time in the resorts pool. I made my kids get out every hour for more sunscreen.
Jen

one bottle of real (not spray) sunscreen will surely last.

A teen boy might prefer spray because it is easier to apply if he has hairy arms and legs : )

I think two would be enough, but I would send an extra just in case...

Ha. I am militant about sunscreen and my boy will rarely use it. I tell him 'apply ahead of time' and he doesn't. I say 'reapply every 70 minutes or when you get out of the water' and he doesn't. I remind him that sunscreen doesn't last all day, he doesn't care. Blah blah blah.

Send what you think he will use. Chances are, he won't, and will come back with a sunburn and a surplus of sunscreen. 

I am not aware of any sunscreens that last all day, particularly through activity.  Could you please link to one?

My dermatologist told me that the sprays aren't as good as lotion suncreens because most people don't use enough to get good coverage. And they're flammable => WebMD link

Get him a big bottle of lotion type sunscreen. And don't forget to get him some chapstick (or other lip stuff) with SPF.

Send a small bottle of lotion for his facE. SpraYing on the face sucks

I can answer this pretty definitively. One spray can will cover a person for 4-5 applications. That's not including faces - which we never spray. My son much, much prefers a spray for swim practice and meets. I suppose it's bad enough that he has to be liberally sun-screened due to his fair skin, layer on mommy rubbing him down with lotion and it's just more than his tween sensibilities can handle. If you spray GENEROUSLY, I can definitely say that spray sunscreens work great. And we're talking do not tan, Irish skin here. He probably needs 3, but he'll probably just use 2 if you're lucky.

I started using P20 (SPF 50) on my family last year and it seems to work well. I'm laughing as I post this because whilst the sun block is sitting waiting to be used, the weather outside is rubbish, windy, wet and only likely to induce rust as a colour! Someone tell the sun it's summer!

I use Ultrasun Sports 50, it's a really good, efficient sunscreen and very easy to apply and it works well for me.    It's a once a day application, even if one is swimming - except for extreme circumstances, when a second application would be wise - but the first application does have to be applied properly in the mornings according to directions given, like any other sunscreen.   I use a separate Ultrasun product for my face.

Not tried the others on your list though Gar.    

I would send 3-4 bottles. I am very fair and I go through a ton of spray. And I'm sure some will get lost or shared.

Thanks, gar .  Like anxiousmom, I've never seen/heard of those.  But seeing as they are all European brands, it makes me wonder whether there is something about FDA labeling requirements that prohibits our manufacturers from calling anything an all day sunscreen.  I can't quite see any readily accessible ingredient lists for the UK brands (at least not that nicely set out the sunscreeny ingredients from the other ingredients), but the one I did find didn't seem to have anything super different from anything we have over here.

I'm sure it's all a racket by the Banana Boat people to keep my buying sunscreen all summer long.

Origins makes a GREAT sunscreen. Think old time zinc-oxide. I use it on my face and I never have to re-apply. It's very thick so a little goes a long way. I never use a whole tube in a Summer. The sport ones are also pretty good - I know that Coppertone makes one. I think the lotions are better than the sprays. If he uses lotion liberally in the morning before going out, he can use the spray for re-applications.