Two-Tone Layering Question

Serj22 said
so if I just barely hit the roof part with purple, like a little splotch over the line i want to make, and not spray the whole roof purple, I should be ok with a gallon? I was hoping to do the door jams yes, but not the upper door trim on the interior. That's already done, painted black.

Basically the whole roof black, except the front A-pillars, and the stripe black, window frames black, and rear of trunk black between the tail lights.

That's it man! Go about a foot past the line with the purple before you spray the black, to leave yourself room to sand the fade smooth. To make sure you don't buy too much you could do the outside first then if you don't have enough for the jams you can order a quart. Although this will take soooo much masking and time waiting for the paint to cure and is bassackward from the normal, it could result in saving some dollars.