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I had to rip out a 4' x 6' section of ceiling and wall to make a plumbing repair on our house. The original walls were 1940s era gypsum board reinforced at changes-of-plane with metal lath.

Some sagging of the joists had caused a slight bow in the ceiling, so I couldn't repair the ceiling with a piece of drywall, because the board see-sawed. So I nailed metal lath to the joists and applied StructoLite like old-school plaster in three coats: a thick scratch coat, a brown coat, and a final veneer coat.

The wall turned out really nice with a creamy smooth finish but my overhead troweling skills aren't so good, and the ceiling has a lot of trowel marks.

So I want to trowel on a sandable skim coat compound which will adhere well to the StructoLite. What would be a good choice?

Any tips would be appreciated too. Do I want to mist the plaster beforehand or wipe it down with a damp sponge? It has been curing for about two weeks.

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  • Should have used a float for the skim coat finish. Would smooth it out nicely.
    – user15806
    Oct 26, 2013 at 13:10
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    Did you ever get this resolved? If so, please give a check-mark to the answer, or write up your own answer explaining what you did to get it fixed and give yourself a check mark. That will help others with this kind of problem know that this has a resolution and is a good place to look for their answer.
    – FreeMan
    Aug 2, 2020 at 17:51

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You can use a setting type of drywall compound like Durabond. You will need to apply at least two light coats to finish.

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    I would use a sheetrock topping mud it is lighter and very easy to sand. For finish work with topping mud I will use a 12-18” mud knife, it goes fast and ends up very flat.
    – Ed Beal
    Feb 17, 2020 at 19:07

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