50. Light gray wash and dirt color have been airbrushed.
50
I used artist’s chalk for the remainder of the weathering. For
the streaks of rust that run down the side, I used chalk powder
mixed with isopropyl (rubbing) alcohol. I used drywall sanding
screens to turn the light rust-color chalk sticks into powder, and
mixed in a little alcohol to make a wash.
I applied the wash to the car with a brush [53]. The alcohol
dries very fast, leaving the chalk behind. I applied the chalk in
layers, and wiped off the excess if I applied too much.
After the wash part was complete, I applied darker powder dry
to resemble rust. Don’t use isopropyl alcohol to clean off chalk
if you put on too much. It may remove the thin airbrush coats,
as I found the hard way.
For darker rust spots I mixed chalk powder with flat acrylic
clear coat. It takes only a drop or two of clear coat for this.
I used a toothpick to mix the powder and clear coat until its
