Application of finish coat over spot puttied surfaces. High alkalinity of surface (evident in new walls). Incomplete drying of putty. Application of thick coat of putty.
Allow new walls to get cured for at least three months. Apply thin coats of putty. Always apply a primer coat after applying spot putty. Always sandwich coats of putty with primer. Cracks in plaster should be filled with cement sand mixture.
The Escape :
Scrape the surface and repaint adopting the right surface preparation.