anyone ever use this stuff to paint there car with how is the finish would it be good for sealing off the body of the car? protecting it from rust?

I used it for a while years ago. It's an excellent epoxy as far as epoxys go. That said, it is extremely sensitive to temperature(needs to cure immediatly at above 60 degrees)and as good as it is, doesn't provide the corrosion protection that etch primer used with urethane primer does. I wouldn't use it.
Gordon VM
Restoration Motorsports

Expoies are not meant to be used as a stand alone product, they need to be topcoated. UV rays or the sun will break down the expoy and let the elements get to the metal, it will get a white chaukly look to it when its broken down. I do believe expoies have a place but not on bare metal and not for a topcoat. Self etch primer is so much better at rust then expoy, but it aslo must be topcoated.

If you are looking for that "Suede" look just get some single stage urethane and add flattener to it to dull it down. This way you are sealed from the elements

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1970 chevelle
1970 chevelle SS455 not a typo its a buick baby
1949 and 1972 chevy trucks
http://briefcase.yahoo.com/bc/sevt_chevelles

so you think some self etch primer and some urethane paint with alot of flattener would do the job?

what does that type of primer do?

I must have missed something here. Why would you need to use a flattener to flatten the primer? There is absolutely no need for this. Spies/Hecker urethane primer(8590)is flat and when applied over their etch(3688 or3255)is about the best system you can get. Forget about flattener. You would be wastimg your money and time for nothing, adding it to primer.
Gordon VM
Restoration Motorsports

No primers I know of can be left exposed they need to be topcoated. The single stage urethane is a topcoat paint like base coat clear but in one stage not two. Adding flatter to the single stage urethane will dull down its shine for the suede look if thats what you are looking for.

If you are looking for the suede look you would want to etch prime then 2K or urethane prime. Block sand the 2K primer then apply the single stage urethane.

Urethane primer is dull when cured or dry, but you cant leave it out in the elements the sun and moisture will destroy it. This is why you would want single stage with the flatter added applied over it.