On Wed, 19 May 2021 19:43:27 +0100, nightjar
wrote:

On 19/05/2021 19:13, Scott wrote:
I am wondering if anyone has tried using Hammerite paint on a plastic
pipe. Mr Google seems to think it is okay. For context, I am
painting a steel fence so it would be very convenient to use the same
paint on the pipe even if it is over-specified but not if it is likely
to cause problems.


Probably depends upon the Hammerite you are using and the plastic the
pipe is made from :-)

IIRC, the original Hammerite used xylene as a solvent. Xylene badly
degrades uPVC, a common material for pipes. However, there are now water
based Hammerite paints, which are unlikely to affect any plastic.

Thanks. I think this is in between, as petroleum based paint, so it
sounds like I should be careful. What is the recommended paint for an
outdoor pipe. (One of my neighbours has put up a white pipe when all
the drains etc are black.)