It worked better but, there was still a good sized rust stain on the counter:
I then bought out the FSR Fiberglass Stain Remover :
and dabbed it over the stain using a disposable paint brush:
After letting it soak in a bit and using a piece of 3M Scouring pad the rust was completely removed from the countertop:
I wiped down the counter with a damp paper towel and finished the job.
Always good to have several cleaners on board to try and I learned a lesson not to let the cast iron skillet sit on the countertop for any length of time.