Jesse,

I used to crest and crown dip with spray paint all the time. Still do when I can find the color I want.

The key for cresting, (and yes you can get the same thin lines you could with any other paint), find some old aspirin bottles. Anything will do. Spray your spray-paint directly into the bottle for about 3 or 4 seconds. You will have liquid paint at the bottom of the bottle.
Apply with a brush just like you would with any other cresting paint.

The advantages are;

1. Spray-paint is cheap compared to some other paints.
2. You only use a small amount & what is left over stays fresh in the can.
3. Drying time is reduced.

The disadvantage is:

You must be careful with you finish. Some will dissolve your cresting. (probably true with other paints as well) I use a water based poly to seal the crest and crown, (also done with spray-paint)

Darryl