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I hung drywall ceiling in my basement. I got impatient/lazy and decided to "finish" the project already by painting it with Kilz PVA Drywall Primer, even if the mudding & taping is not perfect yet.

I would say some taped joints need one more layer of mud & light sanding to be completely hidden (especially the outside corners with the CGC Perfect 90 tape (If I used normal folded paper tape, It would've shown less).

I haven't painted it with Latex. The primer is white and flat, which I think looks OK for now.

Should I decide to "fix" it, can I mud over the PVA primer?

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    Being a hack taper myself I've fixed my work after priming many times. It's never been a problem. – isherwood Jan 27 '17 at 20:52
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You can absolutely mud over cured primer. (Or cured finish paint, for that matter.)

Use all purpose mud (not a setting compound) and scuff the primer gently with 120 grit.

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Polyvinyl acetate dissolves in water and the mud is water based too. There is a possibility of the mud detaching and falling off. (Happens all the time) I would recommend sealing in the primer with a waterproof latex with texture. The texture will help the mud adhere better.

  • If that was the case, wouldn't the primer dissolve with the application latex paint and discolor it? – isherwood Jan 27 '17 at 22:16
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    Cured primer does not dissolve in water. Period. – Aloysius Defenestrate Jan 27 '17 at 22:26

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