You absolutely have to punch out the center pin on the rivet. I used a pointed air chisel that I ground down into a perfect sized punch that fit the inner diameter of the rivet. Once that gets punched out the head does come off. When you sharpen your flat chisel, take more out of the backside that rests on the roof metal so you don't have too much of an angle meeting the head of the rivet. I swear, I love having rivets. Sure got them off quick if not quicker than the YouTube video. My wife was on cleanup duty on rivet heats scattered about!
Let me add that you wear gloves while doing this. I kept my fingers in between the chisel point like a cue stick. Put the point on the center of the rivet, Push hard before firing up the air hammer to help prevent it bouncing around. Wear safety glasses too as it should be a given. Once you get the hang of it, you'll be a pro.
__________________
--Simon
|