Commericaly available resistive surface
There's some videos here of people making conductive surfaces in easy lab processes: https://www.youtube.com/watch?v=ZVCpOIdTT9g

Here is a kind of paint that is transparent,the same that touchscreens are made of, that you can perhaps paint on a statue to render it resistive:
Chinese version: https://fr.aliexpress.com/item/50ml-high-conductivity-PEDOT-PSS-up-to-500S-cm-as-same-as-clevios-PH500-made-in/32258862429.html
RnD lab version: https://www.ossila.com/products/pedot-pss

You can mistakenly buy an industrial product and find that it's an antistatic coating rather than for touchscreens. You can mess around with an antistatic bag and see if it works, they come in A4 sizes.

It will be difficult to source from an units reseller. Intrinsically conductive polymers like polyanilines, polypyrrols and polythiophenes become conductive by removing an electron from their conjugated π-orbitals via doping.
Here's one. It's got 5 wires and it's transparent.

Carnegie Melon made a conductive spray paint to do touchscreen guitars and anything, it's not transparent... it's this kind of thing. 

this is a demonstration of a product simply called electric paint
https://www.youtube.com/watch?v=PkeWxrw6lW0