HOW OFTEN SHOULD BRONZE BE MAINTAINED
CLEAN AND PROTECT AS OFTEN AS POSSIBLE
Bronze should be cleaned and protected as often as possible. Usually, frequency is decided upon based on how likely it is that the protective coating will be removed in its day to day life, whether it is oudoors or indoors and what vision the custodian has for that object.
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With sculpture, a
six monthly or annual visit is more common. Many sculptural items are on plinths meaning that the public does may not be able to touch them. This reduces damage significantly. Studies show that wax does begin to breakdown and stop being useful within a year and so an annual visit is absolutely minimum. If the sculpture is particularly visited by pigeons or overhung by trees then six monthly visits may be necessary as the degredation caused by leaves and guano will be much more significant and rapid.
https://antiquebronze.co.uk/how-often-s ... aintained/