How To sand or treat a large area of old thinset from a concrete slab

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the foyer is on an 18” deep concrete slab old tiles have been removed ( circa 1972) leaving very rough thinset marks as well as gouges trying to pry up the tiles
we are living in house and all equipment to sand with diamond pads appears to create so much grit it will be impossible To do
is there anything liquid that can be put down to “eat at “the thinset making chiseling an easier job. goal is to polish concrete base and leave natural
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