My husband and I are using efudex. Our doctor told us that we can now use sunscreen, when we couldn't when we used it 10 yrs ago. A friend just finished her treatment and her doctor told her not to use sunscreen or anything but cetaphil face wash and a pertroleum based cream. It seems to have changed a bit in the last 10 years since we first used it. Any updates out there that can enlighten us?