We're in the process of stripping the old wallpaper from our walls. Once all the paper is off we're down to the plaster. This house was built in the late 1940's so the plaster is probably about that ...
Is the permeability of normal shellac (flakes dissolved in spirits) the same as Zinsser B-I-N sealer?
I've made a whole batch of clear shellac for sealing ceiling and concrete floors in a heavily nicotine damaged apartment. But I'm worried now that there may be some differences between them, such as ...