Scoochmaroo shares this recipe for basic sunscreen free of the umpteen additives used in commercial varieties.
Sunscreen is intended to shield your skin from harmful UVA and UVB rays. These can cause premature aging, and more tragically, skin cancer. But commercial suncreens often involve more nasty chemicals than necessary.
By making your own sunscreen, you control exactly what goes in!
In addition to some natural oils and emulsifying wax, the ingredients list calls for either zinc oxide or titanium dioxide as a sun-blocking agent (both can be found from online suppliers). Read on for the how-to over @ Instructables