The dent was so close to the glass I removed both the glass and the trim so it would not get
damaged in the repair. I used several layers of masking tape to protect the rear glass.
The first step is to flatten the metal as much as possible. The thinner your mud ( body filler )
goes on the better. 1/8th of an inch is ideal, I would not go more than 1/4inch.
A stud welder is pricelss in body repair, however I try to use them only as a last resort.
This dent was an easy fix by just working the metal.
I had a buddy hold the flat side of a metal toe dolly flat on the out side of the dent.