I hate sun screens of all sorts because in almost no time, I'm sweating like a pig and the muck's floating on the surface of layer of sweat. The answer for me is clothing and sadly, we're really poorly served that way these days.

BTW, I too have developed a sunburned scalp with blotches that matched the vents in my helmet. A bandana fixed that plus gave me that piratical look.

Bamboo clothing works really well. I've only found long sleeved shirts which I save for long, hot days. It breathes well and handles sweat well. I don't iron mine so it always looks like it's just been dug out of a pile of clothes (well, it has). Stops the sunburn though and is cool - all you have to worry about are the bits the gloves aren't covering.

As for legs. I don't have a problem there as they slowly tan up. Consequently, I haven't gone looking for clothing but I'm sure you could find some light trousers made for hikers in bamboo or similar. I know the modern fashion is for tight and stretchy but it is only a fashion and within reason (like, don't wear flares), light, loose fitting trousers will work and be comfortable.