High-quality painting tool, which brand?

After the lime disaster (which is probably typical for lime paints), I used the silicate paint from Hornbach (which is actually a silicate dispersion) and had very good experiences with it.

So, I have now ordered a 14-day set from Storch and just now the putty set from Parfait. To protect the floor afterwards, I am using Brillux covering fleece as well as covering foils. Is there any other tool or material that I have forgotten?

Well, painter's tape. For fine edges. If you don't have any (everything is the same color) and your sheets already have integrated adhesive edges, you might not need it. But good painter's tape is actually always useful. Also for applying silicone joints if you're not that good at doing it freehand yet (I'm not, should use tape, but I'm usually too lazy. It shows accordingly.)

hm… I have never bought sets. They usually come with stuff that isn’t needed at all.
For example, I still have old roller handles from 10 years ago; you only need some rollers for different colors if you can’t clean them properly.
Either you get your tools where you bought the paint, or the nearest hardware store is your friend.
There, on site, you can also see what is available and what you personally are missing.
Protective film, protective fleece, masking tape in several widths, filler or plaster. For that, a small container, corner brush… old piece of wood for stirring…

Ok thank you all :) Now it just has to be done :D

… So with the next house I will …

Notice how many talk about the next house but have just built one or are still in the process ;-)