hoping for some advice from this very helpful forum. I have sugar soaped and cleaned my badly stained walls ( previously emulsioned ), and applied dulux trade stain block+.....is this now suitable to apply lining paper? my intention is to paint the lining paper with water based matt emulsion but a trial area has resulted in the lining paper lifting along seams. Wondered if there should be any further prep needed to walls prior to lining paper. Thanks in advance.