Painting Temperature

When using latex be sure that the temperature is above 50 degrees F. It is difficult for latex to form a film at lower temperatures. With solvent-borne paint, be sure the temperature is at least 5 degrees above the dew point. If it isn't, water may condense on the surface as it cools while the solvent evaporates, causing an uneven blushing effect.
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Surface Prep

When paint fails, it�s usually caused by weak surface preparation. Spend time on a few basics before you begin to get the results you want when you�re done. Simply washing walls with detergent to remove dirt, grease, oil, and fingerprints can make all the difference. A clean everyday floor sponge mop makes a great wall washer. Be sure to rinse thoroughly and give everything adequate time to dry.
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Buying Paint

Most exterior paints will cover about 400 square feet per gallon for one coat. But adjust for waste factors like the type of surface and equipment used. If the surface is rough or porous, add 20% to the total gallons figured. If siding is narrow (4 to 5 in.), add 10%. If on a corrugated surface, add 33%. Also add on a 10% waste factor if using brushes or rollers, add 20% for airless paint sprayers, and add about 40% for air paint sprayers.
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Painting Over Gloss

If you’re painting over an old semi-gloss paint, check to see if it has become hard and brittle. Try to pick off a piece from an obscure area with your fingernail. If it chips, it probably needs a light sanding to improve the “tooth” for a new coat of paint.
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Cover Up

Though it may seem like common sense to some people, one of the easiest ways to cover your furniture (if you have to keep it in the room) is to move it all to the middle of the room and cover it all with old sheets and/or drop cloths.
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Paint Tool Care

If you're going to paint again tomorrow, just wrap your brushes or rollers in plastic and set them aside in a cool place. If your painting chores are done, clean your tools thoroughly. Latex washes off tools and trays with warm water. Oil-based paint requires a thinner or mineral spirit. Wear plastic gloves and work the solvent into bristles or nap and rinse until the solvent is clear. Once dry, store brushes hanging bristles down in their original wrap or paper. Rollers should dry and store standing on end.
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Painting Holidays

In painting, holidays are areas which were not covered by paint. These missed areas will haunt most people for years to come. So don't rush. Watch it dry Latex paint takes between one to six hours to dry. Oil requires eight to 24 hours to cure. The time depends on the climate and moisture in the area you are painting.
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Paint Stirring

When painting from a paint can, give it a half turn periodically throughout the job. Dipping the brush into the can alternately on one side of the can and then the other automatically keeps the contents stirred at the surface and prevents a surface film from forming. Also occasionally sweep the tip of the brush back and forth through the paint, especially with a fast-drying latex.
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