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RADIATORS
Question
I have a home circa 1930. We have water-heated radiators that are
painted white- I think it is an enamel. Can I paint the radiators
with a regular interior latex (to match the walls) or do I need
a special one?
Answer
The odds are that yes, you can be successful using a latex paint
on the radiators. Here are some suggestions and precautions:
1.)
The biggest area of possible problem is that the latex paint will
tend to lift the old enamel from the metal radiator, particularly
if there is a time it happens to get cold in your house (e.g., the
furnace fails); but if the enamel seems to be in sound shape with
no appreciable cracking or peeling, you'll probably be OK.
2.)
First, clean the enamel with a household cleaner, and rinse.
3.)
Choose a top of the line interior eggshell or satin finish latex
paint (some are called "enamels"; eggshell is best); don't use a
flat, or semigloss or gloss paint.
4.)
Apply the paint when the radiators are just warm, not hot or stone
cold. Don't run the furnace for 2-3 hours immediately following
application of the paint. Avoid dark color paint. Normally, you
would want to first sand the old enamel lightly, to dull the gloss
and enhance adhesion of the new paint, but with a house of this
age, odds are at least some of the paint on the radiators contains
lead, so you do not want to sand it, because this may put lead-containing
paint into the air.
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