Cavity Wax?

dibbons said

I have some Eastwood "internal frame coating" (green) on hand but have not heard of "cavity wax" before now.

Rust Preventer Cavity Wax | SEM Products

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I got the Eastwood frame coating for my car and best to cover everything that you don't want to get over spray on. Don't ask me how I know..
I like the cavity wax better for cleaning up but don't really know witch one would be better.