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Painting Polystyrene Coving to Hide Joints

Postby Garffy13 » Fri Jan 18, 2019 9:12 pm

I have a newly decorated room, and installed polystyrene coving to finish off the look. I have used filler for the joints and sanded down.

However now I can see in certain light where I have sanded down and the filler is a slightly yellower colour than the coving.

I'm wondering if you can paint the polystyrene coving, and if so how you would go about it? Would it need a primer? Or can I just go to gloss? Or would this just soak straight in? Couple of coats?

Any advice please! Thanks.
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Gorilla Glue heavy duty grab adhesive

Postby gc1967 » Mon Feb 18, 2019 11:13 pm

If I was you I would apply stain block or oil based undercoat to the yellow patches on the coving, and then paint with a few coats of trade emulsion, would certainly not paint them with gloss,
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