I had a crazy idea.

I used Rustoleum primer in my engine bay, which was stripped to bare metal. To apply it I mixed Penetrol with the primer and used the Harborfreight rechargable spray can. That spraycan did not work out so well for me, it just shot little globs of paint, but the best part was that the paint self-leveled well enough so I got a pretty smooth coat of primer.

So the idea is...what about using a $2 plastic spray bottle, like those you can buy at Home Depot (similar to what Windex comes in) to apply the paint? I would think the spay would be localized enough that it wouldn't kick up enough dust to by like really spraying, but should apply the paint in small enough particles that if you thin it it should self-level fairly well an merge into a uniform coat. You would have to set it to the widest spray pattern so it was more like mist than a stream of paint.

Is this idea even worth testing?