Hi ----- I'm a novice at plastering, and am re-plastering some of the walls in my house. No matter how wet I make the plaster, it doesn't go on the wall smooth, so I end up spending a huge amount of time sanding. I'm sure good plasterers somehow apply plaster in a nice smooth coat ---- can you tell me how to do this please? (I even tried sponge-wetting the wall first incase the plaster was drying on contact, but that didn't help much either!) THANKS !