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Washing Surfaces
Washing older surfaces prior to painting is
highly recommended by many paint companies today, however; often
surfaces can be successfully painted without washing.
Interior; When applying a coat of paint the surface being
painted must be clean enough to allow the new paint direct contact with
the old paint. Generally remove any dust, grease, or soap-film for the
best bond. This may require complete washing or just a little dusting
and wiping. Stains and ink can be sealed with primer sealer. Most
surfaces can be washed with tsp (tri-sodium-phosphate) detergent
using a bucket and sponge. Tsp is one of the most common cleaning
products used prior to painting but other detergents can also be used.
Tsp is available at hardware and paint stores. A few paint manufacturers
do not recommend tsp. Most detergents should be rinsed with clean water
after washing to remove any soap film. Do not use wax type products or
any thing that leaves a film on the surface. Ceilings can be difficult
to wash. A yellowed ceiling can usually be sealed with a quality primer
sealer, but if a non-textured ceiling has a build up of grime it may be
best to wash it first. On new house construction it is seldom necessary
to wash most surfaces prior to painting, although allot of dusting out
or vacuuming will be required.
Mildew appears as dark
gray spotted areas, it should be remove prior to any prep work or
painting.
It can be removed with a solution of 3
parts water to 1 part bleach as follows
Be sure to wear rubber gloves and goggles . Ventilate
the room also
1 Mix contents in a
wash bucket,
2 Wash an area with a sponge
3 Allow bleach to set
a few minutes
4 Rinse with clean
water.
Exterior; One of the best ways to wash the
outside of a house is with a bucket and a scrub brush. Start at the top
scrub an area within your reach allow time for the cleaning mixture to work ,
then rinse using a garden hose before moving on to the next section. Using a squeeze
nozzle with a wide angle spray on your hose is usually the best method of rising down.
Keep the water spray angled downward. Be careful not to spray water into vents
or openings. Be extra careful for electricity & surfaces that get slippery
when wet like
Also see Dulling Surfaces
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