Flash Rust. I least I think that is what you call it. To start off, I have had my car in bare metal for over a year now. I have been slowly skim coating the whole thing. I work on it whenever I get both a few minutes and an ounce of motivation. Plus I got burnt out with sanding, so it is taking longer than I had originally planned to get some epoxy primer on it. Even with that in mind, I have never had even a hint of rust anywhere that wasn't there when I bought the car. Well, not anymore! It was crazy foggy yesterday morning and I opened the garage door to empty the trash cans. It didn't even cross my mind that it might be a problem. I had the garage door open for maybe 45 minutes at the most. So I went into the garage this evening and holy crap, I don't believe it. Everything that wasn't covered, chrome, painted, or made out of aluminum is brown. Fortunately most of the car had a thin plastic cover over it. I have had the hood off of the car since I bought it and the engine was uncovered. Every single steel part, bracket, original bolt, grounding location, etc on the engine, suspension, and brakes that wasn't painted or cleared yet is rusted. At first I thought it was some kind of horrible practical joke. But nobody popped out of the walls laughing and candid camera crews were nowhere to be seen. I didn't know what to do.... I Just shut off the lights and locked the door. I feel completely defeated. I am sure this has to have happened to someone else. Tell me... how bad is it? I know that fillers are good at sucking moisture. Could that rust be under that super thin layer of filler? Do I have to start all over again? I can clean up all the bolts and misc. parts, but I do not want to start from the beginning with the body. Also, I have been working really long days lately to keep the bills paid. I don't know when I will get a chance to be able to spend any significant time on the car in the next couple of months. If I cover it completely will it continue to get worse if it is left like that?