I’m not sure if it’s zinc oxide-based, but I like the Banana Boat Sport Performance Sunscreen SPF 30, which comes in both spray and lotion. I used that at last year’s Seattle-to-Portland ride, which was incredibly hot and sunny and I didn’t burn a bit in the 10+ hours I was in the sun.
This sunscreen is nice because it was one of the few I found that comes in individual 1oz packets (perfect size for saddle bag or jersey pocket). I used the spray before I left in the morning and re-applied a few times during the day with the 1oz tubes.