polisher
From Longman Dictionary of Contemporary Englishpolisherpol‧ish‧er /ˈpɒlɪʃə $ ˈpɑːlɪʃər/ noun [countable] a machine used to polish something an electric floor polisherExamples from the Corpuspolisher• It will not source the gems directly from De Beers but will obtain them from top diamond polishers.• The polishers, and several other groups could also reach that level of pay.• It is also a small but effective water polisher and adds extra aeration.