OK. Start by grinding off the heads of the old rivets and removing the junk...
Place the new strip in place and press a brass half hollow rivet through the hole and support it with a dolly block or a piece of metal sitting on a bench or the floor.
MAKE SURE THAT YOU PLACE THE CORRECT STRIP ON THE CORRECT WING.....
Make sure you use a punch with a sharp point that goes out rapidly, and not needle like. You are only trying to spread the top of the rivet.
Below is after a couple careful taps.
Then go to a FLAT tipped punch and tighten the rivet into place with a couple gently taps or until the rivet tightens up a bit, and you're done.
All three should turn out looking like this.
