I wear the long sleeve shirt and bandanas from here:
https://www.vaporapparel.com/mens/solar-long-sleeve/
They are very good in direct sun, and actually feel cooler than wearing shorter sleeves, as the material is slightly reflective, as well as being SPF 50+ equivalent. I wish they made leggins, but I need to order some white Pearl Izumi or similar for that. I ride a recumbent, so my legs get full sun when I'm riding.
When I ride the velomobile, I've only ridden with the Flevoroof on it so far, so I only need arm and face protection. Long sleeves and sunscreen for that.