Rust, corrosion, wind, rain. The nibbling teeth of mice and the acrid droppings of insects and the devouring jaws of years. The was of nature upon machines, of the planet's chaotic forces upon the works of humankind. The energy that man had pulled from the earth was being inexorably pulled back into it, sucked like water down a drain.
from THE PASSAGE by Justin Cronin

These are aluminium panels, gilded with gold copper and silver, scratched sprayed and generally ruined and then printed with the monochrome image and finally varnished.