Some time ago, I did a deep dive on sunscreens and how much they really prevented skin damage and skin cancer. That dive had me concluding that when I choose to use sunscreen, I should avoid chemical sunscreens and stick with the sunblocks. They are a PITA to apply (sticky) and aren't easily washed off, but I think they are the safest alternative.

I typically do not wear any sunscreen on morning rides, as I am usually home by 10:30 and the uV exposure is low. I do wear sunscreen on longer rides and when I'll be out in the afternoon.

I rather like sunsleeves. I have Garneau sunsleeves and they're effective at at least reducing exposure to the sun. They're quite light and easy to carry, and are effective as "light" arm warmers. A good thing to have in any cyclist's riding attire, and especially so if you are prone to skin cancer.

Oh, and get yourself examined every year. Skin cancer, particularly melanoma, can appear in the strangest places.