When the surface is stained, it is better to  use some light corrosive, like lemon juice or vinegar, pay attention not to use  soap and soda poder to scrub on the marble, when use lemon juice, must pay  attention too.  The stay time had better  not over 1 minute, if necessary could repeat the operation, and then clean and  dry it.
        Regarding to the stain from cosmetic, tea,  tobacco, could apply Hydrogen peroxide  water, make it stay on stain for 2 hours, and  then clean and dry.
        For oil stain, could use ethanol (alcohol), acet  or lighter oil to rub, and then clean and dry, if the marble furniture is burn  by burning cigarette head, could ask specialist to repair.
        In all, the marble countertop had better to  clean periodically, use warm, damp cloth dipped with gentle detergent to clean  and then use clean cloth to dry
    Of course, for countertop with slightly  scratch, could use specialized marble detergent and care liquid, if scratch is  severious, could use steel ball to scrub, and then use electricity polisher to  polish it.
   
   
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