Steve,
It is best to use the same brand of paint that your painter will use for the basecoat/clearcoat to avoid possible chemical reactions and issues later.
Having said that, use a non-porous primer. Picture this- you paint your car with a porous primer and a color coat and several years down the way you get a scratch in the paint. It rains, and water is wicked up by the porous primer adjacent to the scratch and you get... more rust! Ever sand an old car and find more rust under a small nick in the color coat? With a non-porous primer, you can't wick. Stay away from the grey primers or the red primers- particularly the spray cans.
My favorite brand of paint products is DuPont- quality stuff and they make a Variprime 516 (or is it 615) 2 part primer that is out of this world. It's baby poop tan but you can't have everything. You simply mix equal amounts from two cans and spray. Leftover mixed paint keeps in a sealed jar for about a month. Sets up HARD and moistureproof. You can park in the weather at this stage. Apply primer surfacer over it, age the primer surfacer and sand the surfacer smooth. Retouch bare spots with Variprime. Then color coat.
Now, if I just had time to sand mine and color coat it....
Ken
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