Well peeps, i have in the past given my views on one coat emulsions. Well a nightmare scenrio recently. What it was is i gave a cieling a coat of vinyl matt emulsion over an existing one coat painted cieling. Guess what happened ? Well the one coat emulsion started to blister all over the cieling, but only when the vinyl matt was applied over it. Also the blisters did not go away. What i had to do is dry scrape the lot of the one coat emulsion off the cieling which was previously applied over vinyl silk. SO BE WARNED PEEPS....................................... I SEE A NIGHTMARE ON THE WAY WITH ALL ONE COAT EMULSIONS ETC.................