recent column announcing that I am painting the exterior
of my house for the last time brought expressions of
concern from those who donít like the words last time.
thankfully, a couple of painting questions, which is the
reason I write these columns.
Czubaís question concerning painting aluminum siding
is one I have gotten before over the years, but itís
one that always merits a response.
you can paint aluminum siding, and the website of the
Paint Quality Institute in Spring House is my go-to on
all broad-brush matters.
asks: "Iím wondering if this paint holds up and
if it has to be special paint and if the home siding
would have to be cleaned prior to painting?"
as much chalk, dirt, and mildew as you can.
is the powdery pigment on the surface of weathered
siding that comes off when you rub the palm of your hand
over it. Removal is done by power washing or by
scrubbing and rinsing.
only time a primer would be needed is if any bare
aluminum is exposed or if there is still much chalk left
on the surface.
the first situation, remove any white oxide with a
nonmetallic scouring pad such as ScotchBrite, then wash
off and rinse to make way for a latex
the second scenario, apply a high-quality exterior alkyd
(oil-based) primer recommended by the manufacturer for
consumer asked the instituteís experts whether he
should wipe the siding with mineral spirits before
priming, because heís had to use a sander to remove
road salt from the surface inasmuch as itís now badly
answer is no ó unless you have some oily contaminant
such as road tar on the siding.
road salt removed was probably white aluminum corrosion
you do prime everything, you will get a more uniform
appearance from the paint, compared with the result if
you prime only some parts.
a great resource: Bookmark the institute at
time, weíll tackle the second question: Painting