Despite this colour change, this completely natural process will not affect the structural integrity of the item. The speed at which the copper will age is dependent on various factors, including high pollutant areas and the proximity to the coast, both of which will age the copper to a rich green Verdigris finish. Generally, if a copper item receives no maintenance, it could take between six months and two years for the item to start to patina. As this process is organic, some areas of the copper item may age more quickly, and it may take some time for a completely even Verdigris finish. Of course, the process of ageing will be accelerated near the coast due to the salt content in the air.

For those who wish to keep the polished copper appearance for aesthetic reasons and to help slow down the natural ageing process, we recommend an annual coating of yacht varnish, available at most DIY stores, to keep your copper item in a 'like-new' condition.  

Sadly, once the copper item begins to oxidise, there is no way to refurbish it back to its original polished copper state; scheduled annual maintenance is crucial.