I removed wall paper from a 'plaster board' wall. (I think it's called plaster board, It's a thin coat of plaster over a hard rock like board - not the old wood lathes though) The home was built in the early 70's.
Anyway, I removed the wall paper. The wall below was never painted. I patched some holes and lightly sanded the entire wall.
I then painted the wall with a Behr Primer and let it set for two days. I then taped off some squares in the field of the wall to paint some decorative squares (its a kids room... ask my wife). Well, you can probably guess where this is going. The tape is pulling the primer off the wall. Help. What did I do wrong?
It only pulled off in some areas. In the areas that it did peel I can pull off peices of paint several inches long and wide. Before priming I did wipe down the wall to get the dust off.
Also, The wall surface is very smooth.
How do I fix this mess. I assume I need to scrape off anything that will come down but then what? How can I be sure the next primer coat will adhere properly
thanks