Commuting - New skin and my knee vs the sun

Now that I am starting to see the light at the end of the tunnel I was pondering an instruction my doctor gave me. I suppose I could ask my doctor during my next weekly visit for my knee but as I said before, I am bored.

Once my knee finishes healing my body will have basically replaced 90% of the skin on my knee. My original wound tore my knee apart down to the bone.
My instructions are to keep it covered in sunscreen. Being that I spend roughly 24 hrs a week riding in the sun at a mile above see level I wonder if this is adequate. Meaning that since I ride in lycra I am wondering if knickers or knee warmers would be the way to go? Do they make said items light enough to keep me from over heating in 90 degree temps?

I'd either get a bottle of SPF50 just for your knee or a thin athletic kneebrace thingy. Since it sounds like you tore your knee up pretty badly, I'd lean more towards the brace to make sure it's supported as it heals.

I can't ride until it finishes healing and my right arm's fracture is healed as well.
At the moment my knee is an open wound currently being treated with a topical solution and an antibiotic. More curious as to what my options are once I have skin again.
Even though, that is still up in the air depending upon if I terminated my dermis or not.

Heck, get creative if your going to have to have keep your knee basted in sunblock. Paint a pattern on your knee or something amusing to you. And use zinc oxide. The white nose stuff of lifeguard fame...

If a knee warmer ends up being too heavy, try using a plain white t-shirt sleeve.
Also, ouch.

It really doesn't hurt too bad. There is not a huge amount of nerves in ones knee. Either that or quite a few were destroyed. :p

It seems that most cycling lycra knickers are made with the idea of keeping one warmer.
I have found a few knickers for the FG crowd that are a summer weight. Not quite what I am looking for.
Basically lycra that will keep my knee covered without me overheating. Perhaps I should just wrap it. Pain in the arse that is.

The ideal material would be that UV-proof material they make Oneill dive shirts out of. Closest I could find with legs:

http://www.coolibar.com/03507.html

Or you could get a long-sleeve dive shirt and hack off the sleeves. Then you have a UV-proof knee cover and a short-sleeve shirt. ;)

Key with sunblock would be getting something exceptionally sweat-proof if you go that way.

If you don't go with the dive shorts, you can just get a lycra knee warmer, just lycra meaning that there is no fleecy lining. There are many on teamcyclist.com. My assumption is that they are no more insulative than lycra shorts.