If the statue is an antique rather than a modern replica made to look old, it might be worthwhile consulting with a conservator with a large museum in your state or provincial capital city. Phone ahead first and make an appointment. The person may also be able to give you some advice over the phone and/or point you towards other resources.
All the best,
“No lists of things to be done. The day providential to itself. The hour. There is no later. This is later. All things of grace and beauty such that one holds them to one's heart have a common provenance in pain. Their birth in grief and ashes.”
- Cormac McCarthy, The Road
Learn this from the waters:
in mountain clefts and chasms,
loud gush the streamlets,
but great rivers flow silently.
- Sutta Nipata 3.725Compassionate Hands Foundation
(Buddhist aid in Myanmar) • Buddhist Global Relief