ᐅ Plaster/smooth walls using Uniflott compound

According to the manufacturer's information, this can be done. However, I lack experience regarding whether it works well and easily, or if it is better to choose a different brand.

You can also use uniflott for that. It dries with a slightly yellowish tint. Ardex is white.
Then apply primer and paint.

Putty is exactly what you are looking for, as long as you don’t have grooves or defects that are several centimeters (inches) deep. Whether you prefer manufacturer A or B is up to you…

What I’m missing a bit is the information about what surface you want to apply the filler to. Paint, plaster, wallpaper?

It’s difficult to say in general whether filler material X will work. If you apply filler on paint, bubbles or complete detachment can occur quickly. But you only notice that once you start. In some old buildings, you can find glue-based paints under the wall paint. I also like to work with Ardex, but there isn’t much difference. What matters more is whether the filler adheres properly.

With paints, you also need to differentiate more. You can apply a silicate dispersion paint thinned with primer without needing a separate primer coat. (This is not usually stated in the technical datasheet; it’s based on my own experience.) But this also depends on the substrates you currently have. With many other paints, you should not just do it without preparation.