Definitely etch primer as otherwise although anodised surfaces can be
painted, it tends to pull of like a film or bubble if you do not create some
way for it to grip. I know I tried to paint one with a can of car paint,
some mat black and also emulsion and none was very useful.
Brian

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The Sofa of Brian Gaff...

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"T i m" wrote in message
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On Mon, 20 Jul 2020 10:49:38 +0100, Andrew
wrote:

There is an aluminium extrusion that I want to use for an LED strip
light. But, it is anodized and I want it painted the same colour as the
wall. It will be inside and 8ft above ground so well out of the way of
any knocks or wear.

What preparation would I have to do to allow it to take Vinyl Matt paint?

Maybe just some acid-etch primer?

Cheers, T i m