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.
If rubber-base paint has been used, the caustic soda treatment may not be effective and it may be necessary to use an organic solvent type of paint remover. Caution: - When using caustic soda or lye, avoid splashing eyes, skin, and clothing.
Paint & Paper Library arranges its colours in five shades from light to dark to help select coordinating colours for ceilings, cornices, walls, doors and woodwork. If you are decorating around bold furnishings, such as a sofa or curtains, look at paint colours from the same fabric house as they are most likely to be sympathetic.
Water-thinned rubber-latex paint is already an old reliable, though it is only about 10 years old. It accounts for a big percentage of all paint sold and is still the most widely available of the easy-to-use finishes. One new type is a combination vinyl-rubber paint that is said to do a better job on interiors than either vinyl or rubber alone because it dries faster, lasts longer and has less sheen.
Anti-condensation paints are used for rooms with humid conditions such as kitchen and bathrooms. This paint is usually formulated to prevent condensation and often includes fungicide.
Try before you buy Colour cards are fine for making an initial selection but you will want to see a true paint sample in situ before committing. Tester pots vary in price from £1 to £4. Paint onto a sheet of paper that you can move around the room to enable you to see the colour in different light conditions. The effect varies greatly. The window wall can seem dark while the wall opposite will be flooded with light. And of course there is a dramatic difference between natural and artificial light. Finally paint a patch directly onto the wall to gauge the colour, coverage and the final finish.
Use Tinted Primer for Dark Paint Colors.In our second case, suppose you want to apply a deep, dark blue to a beige wall. The good news is that it will be easier to darken a light color than it was to lighten a dark color. In fact, it may only take 2 - 4 coats to get total color coverage in this scenario. The bad news is that if you start out with a white primer you are already moving in the wrong direction. Doing so could increase the number of paint coats you need to 3 - 6... plus the coat of primer! That's a lot of painting!