Late this afternoon I cut out the rusted areas I need to patch on the rear fender lips. I used my cut-off wheel in my 4 1/2″ grinder to cut out the areas and then grind the edges of the holes until the patches I’d previously cut fit. The first one I addressed was on the right rear fender.
After cutting a hole the right size I applied some Eastwood Rust Encapsulator, which should neutralize any rust inside the fender lip, inside the exposed area.
And I did the same on the left rear fender, cutting out to areas where rust had penetrated under the old filler, and then applying Rust Encapsulator inside.