use a bonding agent on the old plastered sections of wall otherwise the
joint compound will not stick.
also I would recommend using a wide mesh (3 ft) on the wall (after
bonding agent) to tighten up the old plaster and sheetrock seams.
|I have finally removed several layers of wall paper in a home around 50
| years old. These walls are plaster, nice and thick.
| Apparently there was some damage time ago and the prev home owner
| repaired areas with sheetrock.. They patched areas. After removing
| wall paper I can see the seams from the sheetrock and the walls are
| uneven with the plaster. In other words I have some areas that are 3
| 3 that have been patched with sheetrock, the rest remain plaster. I
| want to paint these walls. Instead of skimcoating, which would be
| costly, I am patching the areas of and will then sand. I have been
| using wall board joint compound. Tool wise, what is the best tool to
| apply this? I have been using one of those flexible spatulas.. any
| advice one can offer on how to save these walls? Do not want to wall