I'm surprsied you aren't getting flash rust.. if i leave anything bare for a few days it looks like it was in a swamp for years... BTW... that car is looking insane.. love it :)
I am getting some flash rust, but actually better than expected. Must be enough oils on the metal. I do have chassis paint ordered that I will also be using on the interior. It is just a matter of time, so paint will be necessary.