I recently purchased an old house. Due to its age, I don't really know the specifics of the materials used; things like type of paint, composition of drywall, etc. There have also been some animal intrusions over the years behind the drywall (the known intrusions have been fixed).
I have been kicking around the idea of using Shellac Primer on all of the interior walls and ceilings of the house before painting. The idea is that it would form a barrier against the unknown ingredients of the original paint and drywall as well as any unknown animal secretions behind the drywall.
Is this a misguided idea?
I've never used Shellac Primer. Some concerns I have with using it are
- The amount of VOCs from the primer after it is dry; I just don't know if this is considered safe for health to use so liberally in a living space?
- The reduced breathability of walls and ceilings having unintended consqeuences such as mold?
- Whether this is even a correct use for Shellac Primer?
I appreciate any help.