Agreed. Also if applicable, I just use an abrasive grinding wheel and grind the head completely flush. And then hit it with a punch/hammer.I still maintain that cutting a pie into the top of the rivet with a 4.5” grinder, then use an air hammer to shear off the pie pieces, then switch bits and air hammer out the rivet is by far the fastest and cleanest technique.
2 minutes each. Fucking done.