Can't remove right side pedal
I'd like to replace my rusted out pedals but I can't sem to get the pedal on the right off. I've sprayed it down with WD40 and left it soak for a couple of hours but that thing is on there tight. I've stripped off three 15mm wrenches in the process as well as the nut itself. It is a righty-tighty-lefty-loosey, correct? Please tell me I'n not going about this the wrong way. I've tried to unscrew the other way, hoping to break the hold free but no go. Can you think of another way other than drilling the thing out from the back of the pedal? Too bad there's no Allen there.
Also, how do I keep the crank from back pedaling? I don't have a stand so I'm just using my strength (no wonder I can't take the stupid thing off).