My Dart Swinger Project!

Painting outside, the dew will kill the shine.
At least throw an easy-up over the top of it when you finish painting.
I'd wrap it in a tarp, and leave it in primer till you get decent even temps at 70 or above. Just because the air is 70° it doesnt mean the metal has decently warmed up to that temperature. Your car needs other work done, so do some of the other things it needs.
Good point Matt!
As far the dew I'm gonna throw the hood on after its painted to protect when I paint the whole car on buying one of these from harbor freight. Its gonna double as my garage and paint booth lol

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