"Ray" wrote in
:

The base of the downspouts on our building are some kind of vinyl or
hard plastic -- I think it has a name of initials, like PCP or some
such.

They are white, and I'd like to paint them brown to match the aluminum
downspouts.

Does this material paint all right? Would I need to use a primer, and
if so, what kind?

And what kind of paint?


Scrub clean it. Give it a light sanding to abrade it. Prime & paint.
Bonding primer is best. Not cheap but an excellent brand:

http://www.ximbonder.com/upload/pdfs...%20%201143.pdf

Sherwin Williams carried it a few years back.