Morning Pioneer,
As no one else has replied to your post I thought I’d jump in, although I have little to offer.
Firstly I should admit to not being a plasterer. I can plaster and have plastered whole rooms in my house that are good enough to paint over, but not professional quality and not professional speed. I have also never used the skim stuff that you’re on about.
But having no knowledge has never stopped me having an opinion.
If you want a wall or ceiling plastered then you need to use plaster. There is nothing in these buckets of ready mixed gloop that make me think that they would magically mean that someone with no experience could make a decent job of going over an artexed wall.
It’d be good to hear from plasterers who have been called in to fix the mess people have got into using this stuff.
My advice would be to get in a plasterer. It is expensive, but worth the money. £400, or however much it is, is a lot of cash, but not offset against the next 30 years of not having to do it again. You could try plastering yourself, but with all the advice in the world that you’ll get from this board your room will look like a relief map of the Himalayas.
To plaster you need practice, practice, practice. I taught myself by plastering bathrooms and kitchens (mine and the in-laws) that were going to be covered with tiles and cabinets.
I’d be interested to hear the comments from a professional.