Here s how to prepare the surface and choose your paint.
Painting chalky siding.
If vertical paint up to down.
Test old siding paint for lead using a lead test kit.
This oxidation that occurs on aluminum siding results in the build up of a chalk like substance on the siding itself which can easily be seen by wiping your hand across the aluminum.
You can paint it.
This ensures even coats and will prevent you from missing any spots.
If lead is present contact a licensed lead abatement specialist.
This is called chalking and essentially is the existing paint breaking down from the weather.
As a rule of thumb paint takes two hours to dry.
The first step is the surface must be power washed.
If the paint no longer feels tacky or sticky it s completely dried.
It is also important to use a cleaner when powerwashing so that it will actually help remove the chalk along with the pressure.
If your siding is horizontal paint left to right.
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Scrub off the chalk with a strong solution of water and spic and span or tsp detergent or a nonphosphate tsp alternative.
To test the dryness of your paint touch the siding with your finger in an inconspicuous area.
Wipe the surface with the palm of your hand.
By the diy experts of the family handyman magazine.
There are several steps in dealing with a chalky surface to ensure a long lasting paint job.
Some exterior paints such as those used on aluminum siding intentionally chalk for self cleaning.
If your aluminum siding has developed a chalky residue or is faded stained or just plain the wrong color fear not.
Cover ground and nearby shrubs with drop cloths.