[mcbassin]

I used to hate those rivets too till I bought an air chisel/hammer. I just grind a slot in the middle of the head and bump it with the air chisel and they pop right out. If that doesn't work I grind the head flush then hit it with the air hammer with the punch tip. One way or the other they come out pretty easy.
I picked mine up at harbor freight for like $10, works great