What finish are you putting on it Brad?
You should have a waterproofer in scratch coat to avoid suction in top coat. Generally all are ok but there are some god damn awful ones too, or there used to be
I can't recall its been so long, I use Evoplast all the time now, but I remember my dad throwing one back across the counter with the words 'it looks like sh1t and that's exactly what it is!'
Used to kill the mix stone dead and make it unspreadable.
BrilliantNothing wrong with a small bit of fairy ☺
My dad tells me some lads use to use washing up powder late seventies early eighties lol, I suppose it cleans your pebbles well when it rain haha apparently made it really creamy thoughI worked with a bloke in the early 80's who dashed the side of a new block of Council flats in the early 60's. He used Daz washing up powder.
Still on today.