Christine!!!
You're the first person in 30 years who sounds soooo much like myself and while that aint such a good thing, it's nice to know i'm not alone.
I've been prescribed the sun-blocks (usually factor 50) but as they're white they kinda "sit on top" of the p and as everyone knows grease = flakes, which is exactly what my p does when i've put them on.
I've emailed various manufacturers looking for a clear one but to no avail.
I too know, to my cost, the effects of the sun coming thru glass-last summer i had an umbrella half up in the car covering my arms as it was just too hot for me to wear my usual sweatshirts (i live all year in jeans and sweatshirts all year round

). I did cause quite a stir in the asda car park with my umbrella up in the glorious sun, but hey i felt so 8-) wearing my T-shirt!!

I really hope Enbrel does it for you, 'cos you're NOT me

and as you know what doesn't work for one might for another
Niki xx