dev,I might mention I'm also kickass with spraybombing,so it would turn out pretty damn good for a rattle can job.
For an idea,here's my old Contour that I two-toned with a charcoal grey around the bottom. Took me I think 14 cans,and then I wetsanded it all and then clear coated it and wetsanded that,and beleive it or not,the whole job lasted all winter,and came away with only 2 chips on the front bumper! I think I did about 3 colour coats,and the whole thing took me about 30 hours.
That's my trunk lid I was working on when I had the car. I fiberglassed over the red reflectors on the trunk lid leaving the eyeball reverse lights,and I filled in the seam around the licence plate. I got rid of the car before I ever finished the trunk,which was too bad. That car had so much going for it. I'm making sure the Mazda doesn't meet the same demise.