OT: DIY Sunscreen

Do any of you make your own sunscreen?  I was looking for some recipes online this morning and came across a blog with this in it:

I thought it best to check with the experts to see if DIY sunscreen really is a good idea. So I put the question to Sonya Lunder, senior analyst and Environmental Working Group. Her response: “The long and short of it is that it is better to trust the pros than try to make this stuff at home.”   Why? “Formulating sunscreens is an art and a science,” says Lunder. Since homemade concoctions can go on unevenly leaving portions your skin vulnerable to the sun, and since even some essential oils can make skin more sensitive to the sun, expert mixologists are really the best people to be crafting these sunscreens.   Lunder especially cautions people against buying nano forms of zinc and titanium powder. “The particles are much more absorbed by the lungs and nasal passages — which is why we don’t recommend people use powder or spray sunscreens.”

Do you think it is safe and effective to make your own sunscreen or am I better off to just buy a good zinc based one?

Thanks!!