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We are preparing to prime interior walls using a shellac-based primer, followed with a setting compound mud. Will the mud stick adequately to the shellac-based product or do we need to use another type of primer over the shellac primer?

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Why would you prime prior to mudding? – DA01 May 29 '12 at 17:05
Because there was a long history of smoking in this house and we want to permanently 'bury' any odor. Our understanding is that shellac primer is the only one that will achieve this goal. – RET May 30 '12 at 14:09
So is this existing sheetrock? If so, what are you mudding on the exiting sheetrock? – DA01 May 30 '12 at 14:12
The walls are currently painted, and have lath and plaster. Our end goal is to 'bury' any odors with the shellac, then mud (skim-coat) over the walls to create a different texture to the walls. – RET May 30 '12 at 14:38
If the walls are already painted, that's an issue right there. You'd likely going to have to go with a quality primer first. Something that will allow the mud to nicely bond--but even then, you're somewhat at the mercy of the existing layers of paint bonding well. So, prime, skim coat, THEN shellac. (Actually, if you go with a really good primer, you might not even need the shellac). – DA01 May 30 '12 at 16:06
up vote 4 down vote accepted

Yes. This fine plastering expert actually recommends it:

If the surface is new, eliminate any possibility of coating failure by priming the surface in an oil primer, B-I-N SHELLAC BASE is preferred.

Here is another expert plasterer doing the same.

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I am attempting an identical project (nicotine stained walls and shellac). My email is on my profile if you would like to discuss your experience. – skybreaker May 31 '12 at 1:45
My experience is that priming before you mud makes the mudding job much better. The mud will dry more evenly. – Edwin Jun 28 '13 at 8:15

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