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Tried doing it dry but didnt work, so i took it back off and wet the wall and im delighted with it. thanx for all the input guys. Good informative site.

Thanx External, so i can scratch one day and go over it the next and it wont dry as i trowel on? going to do it in the morn so will let you know how i get on.

So is it the same deal with using a powerwall base coat? Powerwall advise using one of their primers but its expensive. So should i wet or use external pva?

Thanx for clearing that up. Got my base coat on (powerwall), and plan to finish it in the next few days but something i hadnt though of was controling the suction before puting on my top coat. I know with sand and cement a wet down would do. Could i do the same with this or use an external...

as above. do you need to put a backing coat on then throw the chips on, or can they be thown onto the scratch coat as they have been mixed in the muck? thanx

I'll cut a long story boring, the back of my garage had to be rebuilt and as the rest of the garage was pebbledashed using Powerwall i now need to match the back with the sides. Do i need to scratch and leave till it sets before puting on the 'exposed' and chip, or could i hit the same day...