Auto body repair & detailing: Replacing fenders on 93 Chevrolet C20 Van, chevrolet c20, spot welds

Question
I cannot figure out how to take the fenders off my 93 Chevy full sized van.  Do you have any suggestions on the best way to replace both fenders? Thanks!

Answer
Unbolt what you can then cut across the top, a couple inches below the windshield. Cut it long enough to have room to overlap the new one and not be to close to the glass when you weld it. I believe there are some spot welds in the door jam near the hinges also.