Keeping flash rust away?

[68nogoat]

Looking for a little advice.

I have a car completely diassembled right now. I have been working on removing rust from things like the engine block, rear axle, and inner wheel wells. However, its still too cold to paint in NJ in my unheated barn.

Am I okay spraying the bare cast and sheet metal with Aero-kroil/WD-40 and wiping it down to keep it from rusting? My plan was to just keep wiping it down with that, and then when the time comes to paint the stuff, to use wax and grease remover and shoot it with Epoxy.

This worries me a little, especially with the cast metal, because I am afraid the WD-40 is going to soak in and mess up the paint.

Any advice would be greatly appreciated. Thanks!