Wood Walls and Trim. New interior walls and wood trim should be smoothed with sand-paper and dusted before painting or varnishing. To preserve the grain of the wood, the surface may be rubbed with linseed oil, varnished or shellacked, and waxed. If an opaque finish is desired, semi-gloss paint thinned with 1 pint of turpen-tine per gallon of paint or the primer-sealer previously described for walls may be used as a priming coat on wood. One or two coats of semi-gloss paint should then be applied over the thoroughly dry prime coat, or if a full-gloss finish is desired, the last coat should be a high-gloss enamel. Paint should not be applied to a concrete basement floor until the concrete has aged for at least a year. The floor should be dry when painted, the best time for application being during the winter or early spring (assuming there is some heating apparatus in the basement), when the humidity in the basement is low. In general, three coats of paint are required on an unpainted floor, and the first coat should be thin to secure good penetration. After the paint is dry, it should be protected with a coat of floor wax. 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.
Remember, you will need to clean the airless in that same fashion before you return the airless back to the rental company. If paints have been allowed to stand and hard lumps or skin have formed, the skin or scum should be removed, after which the paint can be stirred and strained through screen wire or through one or two thicknesses of cheesecloth. Is some color dominating? Our next step is mixing the oil paint. DO NOT SKIP THIS STEP. Obviously you will need to buy some paint thinner, but the most important product you will need is Penetrol $12. Take a plastic quart cup that you will be painting out of and fill it up about three quarters with paint. Now mix in a couple of tablespoons of Penetrol and the slightest amount of thinner. Mix it up with a stick real good and you are ready to go. Why Penetrol? This product is the key to a fantastic looking job. Penetrol will not only smooth out the finish it will extend the time (usually about 20 minutes) before the paint starts to get sticky. This will allow you to apply a glass like finish and eliminate brush marks. We are going to apply two coats here as well so don't glob on the paint. When you are painting the door frames get used to the paint and watch your drips. After about ten minutes or so you will get used to how the paint flows and how damn good your finish looks. Allow to dry overnight before apply second coat. Tip: after you apply the second coat remove the tape and don't allow to dry first. You will get a little paint on your hands from the tape, but deal with it. By removing the tape now you will ensure crisp lines. In some case when you allow the second coat to dry you will pull a bit of the oil paint off. It is not common, but in my opinion why take the chance.