Sue, I have been experimenting on sunscreens. So far nothing has prevented breakouts but I have found a very nice foaming face cleanser from Bath and Body Works' Pure Simplicity line. I usually am seen wearing a baseball hat and my transitions lenses. The sun and heat also affects my Bipolar as well so I have to be careful. I know that I will have to find a better sunscreen than I have now and I know that will be expensive.
So for now only for extensive time in the sun, like tomorrow do I use sunscreen (bad I know), but on most days I just use my hat.