If white color can be presented as a sum of all colors, then black is kind of like a lack of color. However, this color is not very important in the interior. Every evening we go back to night with pleasure to rejuvenate our strength. It is this color that gives the beginning to everything new. Black color is indispensable for contrast accentuation and separation of other colors, giving them brightness and expressiveness. It makes the interior graphic and clear as well as very stylish. A good interior paint job is often 50% preparation and 50% painting. Do not rush in preparing the surfaces in your eagerness to get at the brush or roller. If you do not prepare the surfaces properly, you'll be back with the paint brush or roller in a few months. Obviously, when mistakes like this occur paint companies have nothing to lose. Whenever people pick paint colors that they are unhappy with, the paint company does not have to refund the customers' money. In fact, no paint brand in the country will allow you to return paint once you have purchased it. Even better (for the paint company), since the customer is unhappy with the paint color they chose, they are probably just going to buy a whole new batch of paints!
Materials and their application, every paint manufacturers paint will vary. If you are freshening up old walls and painting back to the existing color, the product doesn't have to be high end or have good coverage. If you need to paint a dark color over light color or light color over dark, you may want to consider purchasing a top quality paint to avoid multiple coats. I suggest Valspar, Pittsburgh or Benjamin Moore top of the line wall paint. These brands work well for straight out of the bucket use and are application friendly. Sherwin Williams is not my first choice because the coverage is poor and you will have to apply multiple coats but, it does apply, fluently. If you find a product does not apply well, maybe it is to heavy and/or sagging on the wall, you may need to thin the paint with a little water, this will reduce the coverage but make the paint flow better and lay down nicer on the surface. I do recommend latex paints for all applications, these days a good high end latex is as good as oil paint and your tools clean up much easier, it will also be less harsh on the respiratory system. The only situation I recommend oil paint, is as a primer/stain blocker over stains that "bleed" through the paint. You can get a stain blocking oil primer in a convenient spray can and spot prime any trouble areas before painting and in the case you need to prime all of the wall due to smoke or water damage, I recommend getting it in gallons and rolling it on where the stains are present. Don't forget proper ventilation and/or a respirator when using the oil based primers! 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. Since the trim is the first to go, the main body of the home will be shortly behind requiring painting. If the trim was recently painted, and a few years later the body is ready for paint, all the trim will need to be covered, commonly referred to as masking off. Masking off expends time, labor and material, which adds to the bottom line cost to the remaining 40%, typically costing an additional 25% for masking trim. Thus costing 25% more after both trim and body portions are painted in separate years. The correct roller to use depends on the texture of the wall. On smooth walls you will need a 1/2" nap and on textured surfaces it will be more like a 3/4" - 1" nap depending on how rough the texture is. I always recommend a lamb skin, it will lay the paint off the best and provide maximum coverage. A roller pole is also great for saving your back, shoulder and arms from repetitious bending over and extension. If you will be using the roller for a couple of days, the same rule applies as with the brush, seal it in plastic completely to preserve it for the next day. Do not leave the roller submersed in paint or water over night, this will cause premature failure, by releasing the skin from the hardboard backing it is attached to. If you will be rolling a rough texture, like a stucco, make sure to purchase a roller frame (arm) that is sturdy and will hold up to constant applied pressure.