Rusty digger:
I just love the way the artist has used the digger like an empty canvas and let the rust eat itself into the overall design with such devastating spontaneity.
It's Art; neo-functional mannerism, cerebral but oblique.*
Or maybe just a rusty digger that pleases the eye.
* Quoted from the song The Party by Godley & Creme, because I couldn't have said it better myself.