Our inground pool came with two ladders which consist of plastic steps
mounted to what appear to be stainless steel tubes. The pool company
supplied the ladder anchors which are now buried in the concrete deck,
flush to the deck surface, and they appear to be aluminum. The
concrete deck has small colored stones set into its entire surface.
Over the years, the insides of the anchors have become more and more
corroded, and they have now reached a point where I can no longer
insert the ladder tubes.

The pool company's suggested solution to this situation is for me to
call the company that did the deck, have them come out and cut out the
old anchors and replace them. But I would like to avoid this if
possible...I don't believe they would be able to do this without it
looking like a patch.

I am thinking that if I had a proper tool, I could perhaps bore out
the insides of the anchors to remove the corrosion and get an internal
diameter that would again accommodate the ladder tubes.

Does anyone think this is a viable solution? Would anyone have a
suggestion as to what tool would be appropriate?

Thanks very much.