I burn like a lobster without sunscreen but had no problem with long days in the Central American sun, even sweating like a pig, using Banana Boat SPF 45 before heading out in the morning and again at lunch. Never applied it to my forehead to prevent the sunscreen eye burn thing. My helmet, even without a visor, provided enough coverage to protect that.

You might also take a look at a Buff with UV protection. I have no experience with them but people seem to love them.