The paints may be applied by brush or spray; the small spray attachment for vacuum cleaners is very convenient, especially for painting radiators.
Basically what you're looking for is a good, solid foundation of existing paint that is stable and still strongly bonded to the car. Many times an original factory paint job, even after decades will meet these criteria.
You'll need a large compressor, not just the typical 20 gallon variety most of us have. This is a 60 gallon, vertical compressor with typically a 5+ hp motor. Then you'll need a decent paint gun (possibly 2; one for primer and one for color) which again is an expense. Then there's the question of where you'll paint the car. Renting a paint booth is best, but can be expensive and hard to find. You can always seal up your garage or shoot out in the wetted down driveway, but you'll inevitably get dirt and moisture into the paint.
And, its never been more important to know your colors. Why? Because color is back in a big way! Just look at the vast variety of colors in the department stores.
Will the color fade? Now this is a very broad question with various answers. Hair color fading is due to many factors. First of which is, the ability of the hair to hold hair color. We call this porosity. If the hair is overly porous it will have a problem holding hair color. There are ways a stylist can usually alleviate this problem. Once in a while the hair is so damaged it absolutely impossible for the hair to hold color. Your stylist should always have the skills to evaluate these situations, and recommend certain conditioning treatments to bring the hair back to a normal porosity.
Colors that are equally removed from a reference color are triadic colors. Since these color schemes can become too intense, unless they are very toned down, they are very problematic to manage. This color combination works well in a child's room, and it can be used effectively in a kitchen.
Using the Sample Card to Sell the Color Wheel. Of course, paint companies are a little sneakier than traditional marketers. Paint brands know that when you are faced with an array of paint displays (such as in your local hardware/home improvement store), you are most likely to focus your attention on the color wheel display that most attracts your eye. Since the marketers of paint brands understand the human (or perhaps, "animal") attraction to bright colors, they know how important it is to include bright, bold colors in their paint lines and place them front and center in their displays. This is the best way to attract your attention to a paint company's color wheel.