Masonry Walls and Ceilings. Interior masonry walls and ceilings above grade may, in general, be painted in much the same manner as plaster surfaces. Here again, it is necessary to allow adequate time for the masonry to dry before applying paint and, in addition, attention should be given to the preparation of the surface. When decorating a wall containing Portland cement (concrete, for example), it is essential to take precautions against the attack of alkali. For this purpose, alkali-resistant primers such as rubber-base paints may be used when oil paints are to follow. When spraying your house, it is a good rule of thumb to spray in the direction of the grain of the material. So if you have siding that runs horizontal, you want to spray in a horizontal style. Also, when you go to spray, the gun should be approximately 12" from the material that you are spraying. Do not pull the handle to spray with your hand still. This will spray a lot of paint in one spot causing it to drip. So have your hand moving when you go to depress the handle. This will give you an even look to your paint. Note: How to use an airless paint sprayer. I'm sure the guy at the rental store showed you how to use the airless (typically with his limited experience of actually painting a house), so hopefully I can offer you a couple new ideas on how to paint your home using an airless paint sprayer. When you first get the airless home, set it in the middle of the area that you would like to start painting. Typically the length of the hose is around 50'. Stretch out the hose prior to painting so that you don't have to worry about unraveling it while you are painting on a ladder. It is a good idea to have a 100' extension cord so that you can bring the airless anywhere you wish to paint without any restrictions. Tip: before you plug in the airless into the extension cord, MAKE SURE THE AIRLESS IS OFF! You don't want the airless to start pumping without paint! Now, when you go to set up the airless, before you turn it on, it's a good rule of thumb to have a second empty bucket next to your bucket of paint. I'll explain why in a second. Place both buckets side by side and place the intake hose (with the wire mesh filter end) into your 5 gallon bucket of paint while the primer hose (usually a lot smaller, about the size of a pencil'ish) is placed in the empty bucket of paint. Before you turn on the machine make sure that the airless is set to prime the machine first. There is a primer valve that you can rotate between prime and paint. A good way to see if the valve is set to prime or paint is to try this little test prior to turning the machine on. While turning the valve clockwise a couple times you will notice that the valve handle will separate from the machine in one position (leaving a slight crack between the valve and machine) while the other position the valve is close to the machine. The position in which the valve is separated from the machine is considered the primer position. Do this multiple times to see what I'm talking about. Don't worry if you keep on spinning the valve, you can spin it a million times in one direction and it won't hurt it.
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! Remember, you will need to clean the airless in that same fashion before you return the airless back to the rental company. Step three: go online and study the basics of shadow and light. It's a visual thing, and too complicated to talk about here. But once you see it, it'll come to you quickly. Simply Google "shadow and light in painting" and the basics will come up. Once you know these rules, you can apply it to any shape, any form, any painting. And it'll make you keenly aware of shadow and light on virtually any object on earth. It's what makes a painting three- dimensional and expensive looking. You can also buy art books on shadow and light at any bookstore. But make sure you sit down for a couple of hours and study it. It will come quickly to you, I promise. Specialist paints also include some exciting new finishes, such as suede effects, metallics and high-sheen lacquers. Judy Smith, colour consultant at Crown, suggests an accent wall in one of these to lift a neutral scheme. Crown's Feature Wall range, which includes eight metallic finishes, nine bright colours and a highly reflective Pure Brilliant White, comes in convenient 1.25 litre tins.