We will finish removing the old tray lip on the upper trunk edge. These are welded in at the corners and on the center support braces. Polishing shows us where the spot welds are that need to be drilled out. | 
Cutting the excess parts of the trunk edge away leaves us with only the smaller sections on the bracing that need to be drilled out. An air chisel and pliers will be our "persuaders" once the metal-to-metal contact points have been removed. | 
Here is our old corner with the welds drilled out. |
The old piece of metal will still need to be air-chiseled away from the quarter-panel. | 
There are still some metal pieces that have light rust but are strong enough to remain. Solid insurance to ensure the rust finally sleeps is Eastwood's Rust Encapsulator (PN 160852P). | 
Here it is applied to the trunk supports. It was also used on the inner support below the rear window. |
Now with the old parts fully removed, we get a chance to actually lay the replacement part into the car. The new panel is a little too wide, but better to be too wide than not wide enough. | 
In order to make the panel fit properly, the ends that meet the quarter-panels must be shortened. To do this, make a small slit in each edge at the corners and gently tap the edge inward. | 
Make sure that while you are "massaging" the edges of the new panel inward, you keep checking to make sure the edges stay straight and square. |
Clamping the corner, a slight amount of warpage is evident toward the upper edge; we will start our weld from the middle and work carefully upward, making sure it's aligned properly as we go. We're not welding yet, but merely seeing what we will need to do to finally install the panel. | 
The piece is fit for the final time. A little more adjusting with the snips and the hammer, and we are ready to put it on. | 
After cleaning part of the paint in the weld-use areas (both top and bottom), the corners are securely clamped down. |