Next time you get some stubborn pedal axle, drip transmission fluid (new or used doesn't matter) in the threads from the back of the crank (gravity works) and wait for it to penetrate. If that doesn't help it give way, you can heat the crank (move it around) with a plumbers torch and it should come loose, but will probably ruin the finish. If you need new cranks, try www.vueltausa.com
Originally Posted by bigbutterbean
Swapped out my pedals today. A few days ago, I discovered that my right pedal was not in the whole way. It also would not easily loosen or tighten with a wrench. So today, I got a seat post to put some leverage on the stuck pedal. It came out about halfway and then started stripping. I started beating the pedal with the seat post in frustration, and the pedal came the rest of the way out. I have a pair of weighted exercise bike pedals that were given to me, and I put those on. Hopefully they will be much sturdier than the $8 Walmart pedals I had on there anyway.