hobbes wrote:
Hi,

My house has these circular columns on the front porch. They are made
of plastic. The white paint that is on them is flaking off and
pealing.

I want to use as the top coat Benjamin Moore Alkyd Exterior house
paint to match existing colors.

What is the correct primer paint to use?

For the selected paint, BM will have a suggested primer. Whether that
is suggested for the application is a different question.

Where you need to start is w/ the composition of the column and the
manufacturer's recommendation for finish/painting.

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