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I have a small holiday apartment in Europe that has pre-fabricated concrete walls. The surfaces are relatively smooth but I want to prepare them for painting by applying a skim coat of plaster. Which kind of plaster is the most appropriate for this purpose.

By the way, these are internal walls.

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up vote 1 down vote accepted

Any top coat plaster should be OK.

It might be worth priming the surface with a diluted PVA solution (5 parts water to 1 part PVA - from memory so double check) to seal it.

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Is it possible to just seal the wall, prime it, and then paint (maybe using a thick nap roller) avoiding have to put down any plaster? After you have sealed and primed the wall, a coat (or two) of paint with a thick nap roller might be able to smooth out any small defects in the pre-fabricated wall. And painting is going to be much easier than putting plaster down. (Of course patch any major defects in the wall prior to sealing it.)

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I agree, priming (maybe putting down UGL drylok to help with any possible moisture issues) would be a much better idea than plastering. – user45 Sep 14 '10 at 13:39

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