Oil based Primer?
We had a ceiling done by a contractor: 2 skim coats, oil based primer & 1 coat of paint. Contractor said he used Sherwin Williams low odor fast drying oil based primer. However, there was absolutely no smell what so ever.
We tried to perform a test to determine whether there in fact is a coat of oil based primer underneath the paint by rubbing a wet paper towel gently on one little area of the ceiling. The paint comes off and then water seems to get through and the skim coat becomes visible.
Now, I don't know if I'm crazy or what, but I thought oil based primer should keep the water out. So just in case i took a piece of Sheetrock and applied oil based primer (not the one they used) to it and let dry over night. In the morning I performed same test with a wet paper towel. Nothing... in fact i even tried scrubbing it with my nails and nothing.
Does anyone know if the primer can fail or may be they applied too thin of a coat? (they sprayed it on)
Any thoughts would be appreciated, thanks...