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Old 03-16-2016, 07:16 PM
Tlouis Tlouis is offline
Level 10 user
Join Date: Aug 2006
Location: PA
Posts: 389
Smile Re: New Plaster to Old

Here is a simple solution .
Give the old plaster a coat of white or amber shellac. When the shellac is thoroughly dried, you can apply a new layer of fresh plaster which will not penetrate the shellac.
I have used this method numbers of times and it was always successful.
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