How much SPI Epoxy Primer and Epoxy Activator will I need to do my whole car. By whole car I mean, the complete exterior of the car, the door jams, the bottoms and back sides of the doors, the bottom of the trunk lid, the area under and around the trunk gasket, the fenders under the hood and in the engine compartment area. Would 2 quarts of Epoxy Primer and 2 quarts of Epoxy Activator be enough? That would be a gallon of useable Epoxy Primer correct? Thanks, NYH1!