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There is always the option of a preval sprayer.Lets you have the convienence of a spray can with the quality and duability of automotive grader paint.



IF (and that's a BIG if) you catalyze the paint!



If you use enamel its mixed right in.But I am no paint genius do yo mean something besides the drier thats mixed in?I know a urethane has to have a hardener mixed before you spray.



There is no 'pre mixed' catalyzed paint that doesn't have a very short pot life (as in hours). The catalyst actually molecularly 'crosslinks' the dried paint molecules. That means the paint is literally a DIFFERENT compound than uncatalyzed paint. It's much tougher, much more chemically resistant etc.

Now you can take automotive paint (acrylic enamel, acrylic urethane etc) and spray it, and it will dry and look good, for awhile. But it will perform very poorly compared to the same paint that had the hardener added. Most notably in terms of oxidation and reaction to bird droppings, gasoline....etc.