If a guy has several things to paint, it may be better to buy a quart of paint and then put it in one of the prevail sprayers avaiable from hardware stores. I've been told they work well with auto paint. In fact I think that's even mentioned on the package or advertisement.

I've used the Prevail sprayers for spraying all kinds of small projects. They work well, if the paint is reduced enough. (Thick paint doesn't work well!)