What is the best way to restore an interior slate floor that has been urethane coated ?

 

Dear C.:

The urethane coating must be removed and then, either you apply a new layer of the stuff, or you go into a different (and better, IMHO) maintenance program, by applying a good quality stone color enhancer like MB-6. 

 

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Ciao and good luck,

Mauri z io Bertoli

 

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