Adhesion problems.

I had painted some trim at home with Leyland WB Satin, did a bit of sanding etc but not over much tbh as the condition of it was good already. I had previously used oil based but as it had all yellowed I went to WB and picked up the Leyland stuff while I was in Screwfix. Not too impressed when putting it on, no levelling to speak of but it was nice and white
Not long after the wife said ''you're a $hit painter, that paint in the boys bedroom is all peeling off''

Fast forward...

Adhesion problems.