Yes, much faster,and if you use a good primer first, your 'coverage' is as good.
Depends on the spray gun, but in most cases, yes.
Generally, water based paint dries faster.
Yes. Spraying paint is faster.
People say that spray painting is better than airbrushing. Airbrushing is usually handheld.
If you are starting out, stick with the cans. You have a lot of control that way. The paint gun may do it faster, but like you said it is more expensive. You can always open shop and save up for a really good paint gun once you get a few customers.
Yes, Co2 packs more of a punch than compressed air. They use Co2 for paint ball guns, and regular paint guns. It is also used for some BB or Air Soft guns.
Although you can paint the shelf with paint pens, it would take longer to do than if you used a brush or spray. It would more than likely also cost you more.
There are a few dangers of fabric spray paint. These dangers include: getting the spray in your eyes, nose and mouth, using the product in an area that's not well ventilated and spraying it by mistake on something other than the fabric.
There is a difference between industrial paint and regular household paint. Industrial was meant to last much longer than regular paint. There's also a huge difference in price as well.
colored paint... usually more than one color.
it works like a tiny paint sprayer. a computer program directs the nozzle to spray in the shape of each letter or character.obviously this happens way faster than your eye can see.
Enamel in the spray can will not dissolve an existing coat of the same paint. There is something else going on there. Double check the can(s) to be sure you are using the same product. It sound like you applied something other than enamel to the existing surface.