Andybill,
Sorry for delay in replying. I have never been on a plastering course, not sure where you got that idea from ?
I fit bathrooms and Kitchens and have been plastering for many years. I specialize in a complete job. What i mean by that is that i come in rip out your old stuff including the walls and totally re-fit your room.
Here i mean like this, I remove old gear, re plaster, Plumb, tile, refit, decorate and then you pay me
This is one i did last week. I forgot to take an after picture
I must go back and pretend i have left a screwdriver under the bath and take one
As you can see, i specialize in OLDER properties that have lots of hidden history beneath the old tiles and walls
If you look carefully, you can see my 14" trowel on the windowsill
Please note the only time i use plasterboard is if the wall is a stud. I NEVER dryline walls. Thats a job for amateur plasterers who like a flat surface to skim.
Look over the window, you have the wallplate, one course of brick and a wooden lintel
They really knew hoy to build houses in those days..
Get yourself a Marshalltown perma shape stainless steel trowel. They are VERY light (very important when you are plastering all day) and the finish they give is very good.
As for the practice, well you can skim a few times but the more you keep building up the layers, the smaller the room is going to get
If your beloved will allow you, hack the lot off to bare brick and have a play at bonding or browning...