I've been told that those custom wheels are made of wood but I don't know for sure. Check a company called "The Eastwood Company". They specialize in restoration coating, chemicals and tools. I'm sure they'll have something more durable than rattle can paint.
Keep us (me) posted on what you come up with,
Scott


Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
1953 and a 1956 Ford F800

Raising a teenager is like trying to nail Jello to a tree!