Bald is beauti.....no it's a burn magnet

Jokes aside, I'm losing more of my hair - on my head that is- as I'm getting older. Before now I had enough hair to make it impractical to apply suncreen to my dome. Almost all of it ended up in hair and not on my scalp. So I ended up buying and have been wearing one of those Dakine bucket hats with a strap. Now I'm in the fortunate position to have enough baldness that I can actually apply sunscreen. I was wondering what some of my fellow baldies are doing out there are doing in terms of sunscreen for your bald head? I already know that anything other than natural sunblock with zinc or titanium dioxide will burn the hell out of my eyes. I have been using the Wavehunters zinc stick for my face and nose, but the stuff is crazy expensive and would get used up quick if I applied it to my dome. One obvious answer is to continue to wear the hat. But sometimes I would like to ditch the hat without my head getting smoked from the sun. I thought of a poor man's way to apply zink to my head would use Desitin daiper rash cream. Has anyone had any luck doing that? Thanks in advance for any responses.
Cheers!
Cheers!