Hello plaster masters of Reddit!
I'm hoping to get your green light to go ahead with some first time plastering I'm going to be doing over the next few days. I've been watching a lot of YouTube videos and researching and I think I've got a good idea of what I'm doing but I just wanted to triple check that I'm definitely using the right things in the right places.
The plastering will be in an old house (~1900) and the existing plaster has quite a bit of wear and tear from the last few decades. The walls had been covered with lining paper but it was starting to lift in several places so we've decided to take it off and replaster before we decorate rather than using lining paper again to just hide all the problems. I've attached pictures of some of the cracks and holes as well as where the plaster has blown.
While I suspect that some of the yellowish plaster is lime, I'm planning on using a combination of Thistle bonding coat to fill in the worst of the holes and cracks, and then use thistle multi finish to do the final skim coat. The walls as you can see have pretty much every type of plaster on them from over the years but I just wanted to check it's okay to go with multi finish everywhere as 3 of the walls I'm doing will be exterior walls. If yes, are there any other sealers besides PVA that I need to use on those walls?
My other question is if it's better to use scrim tape or just fill in with bonding over some of the finer cracks? I've also got easy fill if needed.
And finally, while I'm happy to attempt the walls, I'm definitely not confident in trying to do the ceiling especially as we have high ceilings and it's going to be very hard to reach. The ceiling is the same story - lining paper but the joining lines have become very visible and we want to have them overboarded and plastered instead. Does anyone have a rough estimate for how much it would cost to do this in London? The room is 4.5m x 3.5m.
Thank you so much for any help in advance - this community has already been incredibly helpful in my research!