RIGHT JUST REREAD YOU POST YOU SAY THE PAINT IS PEELING OF IN SMALL BITS WHEN YOU ROLL? HAVE YOU LET THE PLASTER DRY COMPLETELY? AS ANY SLIGHT BIT OF DAMP AND THE PAINT WONT STICK THE SUCKION FROM THE ROLLER LIFTS THE PAINT OF, SO HERES WHAT I WOULD DO FIRST FILL THE AREAS WERE THE PAINT HAS PEELED USE POLYCELL TRADE FILLER OR TETRION BOTH DRY WHITE THEN SAND LIGHTLY WHEN DRY. NEXT ONLY PAINT THESE AREAS WERE YOU HAVE FILLED WITH MATT EMULSION THE REASON BEHIND THIS IS TO AVOID THE FILLER FLASHING THRU AFTER YOU HAVE APPLIED THE TOPCOATS OF PAINT.