ive just had the joy of platering an artexed sun room no ceiling.and even after good a sanding and two coats of multi you could still see the pattern through the plaster.i advise over board then skim
hi.im about to tackle my first big rendering job once the weather improves ive been a self employed plasterer for 18months and feel that this is an area would like to brake into. ive already done the odd garden wall but im unsure about how to add the correct amount of waterproof solution to the mix