Riding with a burn/open wound?
 

So I was working on my car this weekend and burned by forearm pretty bad on the exhaust manifold. It's deep enough that I can't even feel my arm there because there are no pain receptors in the skin (no skin) left. It's about 2 layers deeper than a sunburn that peels off. http://i.imgur.com/Zu1aX9Mh.jpg The pic is from aSunday, so it has gotten a little better, but not much.
We're going out today in river that's not terrible, but not known for being the cleanest.
What is something I can pick up at walgreens, walmart, etc. That will cover it and keep it dry while riding?
I'm only going to surf, and while I can platform start and stop without getting wet, I don't want to take the chance of me falling, nasty stuff getting in the wound, and my arm falling off.
I was thinking if all else fails, wrap it up in saran wrap and duct tape it. But I'm sure there's a better actual option out there I'm just not aware of.

I scraped the side of my shin off during a fall downhill mountain biking in Colorado, and went surfing the next day without anything covering it. It was a bunch of nice raw skin also, and I never got an infection. I cleaned it pretty good with soap and water when I was done surfing to kill bacteria. Granted, this was a mountain lake, and you could probably drink it if you wanted to, but I'm sure it was still littered with fish crap, deer/elk/bear/wolf/and whatever else poop/piss bacteria. I'd say go for it man.... YOLO MOTHA FUGGA!!!

Just bring some iodine with you and apply after you ride. "should" be fine

plastic bandage that thing.
https://www.medicalmega.com/medical/...x7_xoCCyPw_wcB
YOLO is right. but YOLO without some fecal based infection in your skin is better

As much as I would just "YOLO" normally, the Columbia/Willamette oddly the cleanest. We have ecoli and algae bloom warnings to not go in the water almost every year. There's none right now and I have no problem getting in most of the time, even with minor cuts and scrapes. Hell, if I didn't get in unless I didn't have some kind of wound, I'd never get in, blue collar job and all. this is just a bigger/deeper one than I'd ever ridden in. Most of the time I leave that kind of stuff uncovered unless actively bleeding and I'm fine.
I stopped by Wally's and lucked out.
I picked this stuff up, oversized waterproof bandages, shower protector film, and waterproof tape.
http://i.imgur.com/wcHRfa1.jpg
I put on one of the bandages to replace my gauze and electrical tape bandage I made this morning. I'll wear it all day at work. If it's fine until I get to the ramp, I'll leave it and just go with that. If not, I'll put a new one on, put the shower protector over it, and tape it up.
Seems legit so far though.
http://i.imgur.com/eTUPgqO.jpg

Oversized is right... holy ****!

Ya, for some reason it got posted as full size and not scaled. I tried to edit it, but the 10 minute window on edits was already up. Now we have to live with this monstrosity.