Ever try making sunscreen?

I found a great recipe on-line for a sunscreen, so I made it today and used it at the pool and my skin didn't burn in the sun. The ingredient are; 3/4 teaspoon of zinc oxide, 3/4 teaspoon of titanium oxide (or use all zinc or all titanium), 2 tablespoons of coconut oil, and 2 tablespoons of natural shea butter. I used all zinc oxide and the tube cost $3.00, and the jars of coconut oil and shea butter cost $7.99 each, which will last me all summer, this homemade suntan lotion is so much cheaper and much less toxic than all the commercial suntan lotions being sold, so I am really thrilled that I found out how to make this suntan lotion on-line, but just a warning that the amounts I used may not be suitable to prevent sunburning for all skin types, but it worked on my skin, which will first burn in the sun and then tan.