Replies

1. 
   Guest_ | Apr 11, 2000 04:39am | #1

   *
   Although I am not familiar with "diamond plaster" in particular, I can say that any flat white or light colored paint makes a fine primer. The reason I say flat paint is this... Firstly, falt paint will soak into the plaster a bit more than a glossier paint. second, flat apint will leave a "rougher" surface for additional coats to adhere to and third, it is a usually cheaper than Primer. A lot of primers have a satin or semi-gloos luster and do not really bond that well to plaster. They seem to almost float on top and dry insted of penetrating first like a flat paint will do.

   Pete Draganic

1. 
   Guest_ | Apr 11, 2000 12:31pm | #2

   *<>I used to know that, but forget. If its 3 coat plaster, it was a long time, at least a few weeks, if not months.Bob

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   Guest_ | Apr 11, 2000 02:27pm | #3

   *LRZ,USG says as little as 24 hours. This is with a one coat system obviously. If you have a two or three coat system it will be longer. How long? I don't know. The critical factor is the moisture content of the skim coat plaster. If you paint too soon you'll "flood the key" (saturate the bond between plaster and substrate) and cause delamination. See http://www.usg.com/proplast/p01.htm for more info.Eric

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   Guest_ | Apr 11, 2000 04:26pm | #4

   *From experience (ugly experience at that) only, not skill (I'm a pastry chef, not a carpenter, who has been blessed (cursed?) with an old home), I would let 1 coat of plaster cure at least 4 days, 3 coats of plaster at least 2 weeks before priming. I got impatient, thought it was dry, wanted it painted 'cause I was sick of looking at it, and damned if the paint didn't crack and peel about 1 month or so later - the wall looked like it had psoriasis or something! I had to sand the bloody thing down and re-prime and re-paint. Of course, I cussed and cursed myself the entire time I was repairing my screw up - I say err on the side of caution and give it a long period of curing.

1. 
   Guest_ | Apr 11, 2000 05:31pm | #5

   *In the old old days of true lath-and-plaster I think you were supposed to wait six months!USG does promise next-day decoration -- under good conditions -- for its veneer plaster system.