Painting a garage door can be an inexpensive way to meet an aesthetic requirement or to overcome the effects of prolonged weather exposure such as wood rot or sun bleaching. Preparing a new or already painted garage door can help to achieve an even finish and offer lasting results.
Removing Old Paint
Before painting a wooden garage door, a little prior preparation can help achieve better results. Brush off flaking paint with a wire brush, then give the garage door a light rinse of water. After it dries, sand the door with 100-grit sandpaper to remove any residual paint and give the primer a smooth surface to which it can adhere.
Removing Wood Rot and Sun Bleach
Older wooden garage doors can become damaged by wood rot, a fungus caused by prolonged moisture. Sun bleaching -- caused by sunlight and heat exposure -- can fade old paint and crack the wood. Fill any cracks and improve the wood's ability to repel water, using paintable exterior caulk. Allow the sealant to set up before sanding it. Alternatively, wood filler can be used to smooth out the damaged areas and restore the appearance of a weather-beaten door.
Dust sheet and primer
Applying an undercoat of wood primer will provide a better foundation for your surface paint and help prevent future flaking. Primer can prevent wood knots from showing up on the painted surface and increase water resistance, reducing the chance of future wood-rot damage. The use of a dustsheet on the ground will prevent any unwanted paint splatter on the floor. Using tape to cover any locking mechanism will stop primer from seeping in and potentially causing damage.
Depending on your budget, there are several methods of applying paint to your garage door. A paint sprayer offers increased surface coverage saving you time; however, applying the paint in thin layers from a constant distance of 12 inches is something that potentially needs to be practiced. Painting with a brush in a horizontal motion can help achieve an even finish and prevent paint smears and splatter. A roller is used to cover larger surface areas and to paint garage frames. Several layers may be needed, depending on the brand of latex- or oil-based paint.
Waiting for good weather conditions can aid in assessing the coverage of paint applied. Sufficient lighting during the day gives you an opportunity to see your previous strokes or sprayed areas. Undertaking work during minimal winds can prevent dust from potentially getting into paint, resulting in a uneven finish.