I go to swap meets, junk yards, fields etc to find interesting rusty vehicles. This one was at a swap meet. It is 400 grit UArt, painted with Micaceous oxide acrylic paint, the landscape portion is terra cotta Art Spectrum Pastel Primer. Then I do a metallic acrylic underpainting for the truck, then cover in pastel, leaving bits and pieces of the underpaintings show through.