Copper sinks are intended to have a beautiful patina that changes through recent years. This does not mean, however, that you want a sink with spots, scratches and large patches of brightly coloured copper. Applying a protective wax finish will help safeguard your copper sink against unwanted blemishes while still letting it acquire a nice patina with time. The wax will even help safeguard the sink against damaging acidic foods and lets you use your beautiful copper sink without always worrying about harm to it.
Clean out the sink having a non-abrasive, non-acidic, gentle cleanser and a soft sponge or cloth.
Rinse the sink thoroughly and dry it using a soft cloth.
Set a dime size dollop of plumbing fixture wax to a clean sponge or cloth.
Apply the wax to the sink at a gentle circular motion, working in little locations, adding wax into the sponge as required until the whole sink is coated in wax.
Wait three to five minutes, or the time recommended by the wax manufacturer, for the wax to dry.
Buff the wax using a gentle circular movement and a clean sponge or rag.
Re-apply the wax as required whenever the water stops beading up on the sink’s surface. In most cases, this will be about every 15 to 20 days, but sinks which have heavy daily use it may require it more often.