Well alrighty then, the job is complete! I had a friend w/ a snake attached
to a power drill that fixed the problem. This was the only way to resolve it
I guess; Of course, I don't know much in regards to concentrated phosphoric acid or concentrated sulfuric acid but I will definitely keep this suggestion handy!
When the snake was put through, it met some resistance at about 3-4 feet
and was due to small flakes of tub coating. When the tub was refinished, whoever did it failed to do it properly thus causing it to peel in minute pieces.
Thank you for all of your assistance & know that this posting will hopefully
assist someone in the future.