Here is the sequence:
Before: you can see the surface rust all over this area

During: here you can see post the metal prep. I also used a steel wire brush to help the metal prep do its thing. After the metal prep, I sanded with a block and brought out the dremel with a wire wheel attachment to get some of the corners. It really removed almost all the rust in 20-30 minutes

After: here it is after 2 coats of POR-15 black. I could have done some removal of the good original paint, but the POR-15 did cover it with the second coat.
