I do have one and I really like it. It frees up my wrist so that I can make all those crazy swirls on the rail cars. Maybe you've seen my work. Trains move all over the place.
I also use it for inner fenders and running boards, and radiators. Rust-Oleum Glossy black. Flows like butter and is easily touched up later.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission