I've found this one but don't know of anyone that has used it and would prefer to go on a recommendation of one that has been tried and tested so to speak. I have heard that zinc oxide is better than titanium oxide at protecting against UVA rays.
I haven't used sun screen with zinc oxide, have just been googling and apparently zinc oxide goes onto the skin more efficiently than titanium oxide. Don't know if that is your understanding also? That said, I always use either the Sunsense toddler milk, or Nivea children's sunscreen, not the spray. Both these products have a high titanium oxide content. I can honestly say that DD has had no skin reaction to either, and has never shown any sign of sunburn. Sorry, not much help re your question, but just trying to help
Yes you just need to run it in more than you would with a chemical one. But I do find more of it gets onto clothing than other suncreams for this reason (washes out absolutely fine though) I think this is common amongst all mineral sunblocks though (although Jason is the only one I've used)