....although saying that looking at them I'd just take the heads off with the power file, something I've become quite dexterous with. I suppose farting about with models has paid off when it comes to having a light touch, and knock them through with a drift......
To be honest we were taught to remove rivets by just drilling the head with a bit the same diameter as the rivet shank and then to insert the punch into the drilling and snap the head off before using the same punch to drive the rivet out. Obviously when removing a hundred or more rivets from an aircraft skin we rarely took so many separate steps.