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Frequently Asked Questions: Interior

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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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