Im holding off on painting my car until next spring so I can have the time to do it right. Right now I want to get it so I can drive it until then so I can retire my 94 Camaro and 72 GTOs as daily drivers.

Question is, if I prime the entire car (minus the jams which have color already) and put a coat of PPG sealer on the car, is that going to prevent any moisture from getting past the sealer?

Plus in a sort of sick way, I think with nice wheels and a straight body, the car would look good in primer/sealer which I believe is a flat black when my buddy did his 79 Camaro.

 

I really don't think that will help at all. Sealer is used right before you lay your first coat of base...it hides scratches from sanding the primer. So, right before you paint it, you'll want to spray your sealer.

I personally would never drive a car in the "elements" if I were in the process of painting it. I would buy a beater for a $1000 bucks and let your other ride sit until your ready to get started on it.

 

Sickness is right. Primers and sealers don't have UV protection or any properties to repel light or moisture. They can actually soak in moisture and whatever may be in that moisture. Then it's trapped in the primer that's under your paint. May not show up right after paint but it will soon.

BTW Sickness, I LIKE YOUR SIG. Especially the last line.

 

Epoxy primer like PPG DP90LF (90 is black), which is also thinned and used as a sealer, is going to keep moisture out. But in your case I would use it full strength, as a primer, instead of reduced as a sealer. And then sand it good and seal it again when you're ready to do the final finish.
Back in the day when people were doing streetrods and wanted a primered look they would finish their prep work, prime the car, put on a color coat of lacquer to prevent moisture absorption and then another primer coat for looks. Because like was stated earlier primer will soak up water, road grime and whatever else happens to fall on it.