Buddha made of “yeso” and faced with plaster of Paris. Wikipedia defines yeso as plaster. It is different from plaster of Paris in that when it gets wet it starts to crumble and go soft. Yeso is used extensively in Spain in the building trade.
The Buddha was painted with a false patina to make it look like antique bronze. The sculpture was about 1·5m tall and weighed in at about 250kg.
When the Buddha was delivered to the Molino del Cura all the Thai staff were very emotional. They thanked me profusely and immediately started to decorate the area with flowers and offerings as you can see in the photo.