Very cool and I wish I had time to try some of this work myself. However, one critique is that his placement of rust holes in the body seems a bit un-natural. Rust occurs from the inside outm which he does well, but is typically at the bottom of things where water, leaves, and road sediment settles. If a bottom of a door rusts through, odds are the rocker below it will show similar decay before points higher up will eat through the surface. Rust around wheel openinsg will follow the structure behind the skin and create patterns as well.
Overall, great work!