[jlaird]

Here is the best way I have found. take a angle grinder (with grinding disc) and grind an X in the top of the rivit. Then take a chisel and hammer and knock each of the four pieces off. Take your grinder again and grind down the remaining flush with the frame. Then take a punch and hammer and slam that bad boy out. Should take a couple minutes for each rivit after you get the hang of it.