[Spridgets] Bugeye original paint

[Dean Hedin]

One of the original brochures for the Sprite states the following:

"Compact and 'clean', the body of the 'Sprite' is first completely
immersed in in a rust-inhibiting compound before receiving its
finishing coats of high-lustre enamel, thus ensuring long, trouble-free
life."

Questions :
What was the rust inhibitor they dipped it in?
What kind of enamel was used?