Interior painting defective or acceptable?

It's simply a matter of taste. In Bauhaus flat roofs, such historicizing elements probably do not fit well.

Yes, and in Versailles they would be too plain. There are unsuitable places for everything.

But here in Armeleutebungaliw they fit like a glove on a bucket. It would just be an idea to cheaply and quickly disguise the knobbly ceiling edge from TE's mural. Off to Knutzen, bought a box of 10 pieces for a few euros, some glue or Sille, and voilà, done.

Such historicizing elements probably do not fit well on Bauhaus flat roofs.

The trim also fits in the poor people's Bauhaus houses that are constantly discussed here.
It's always great when "time-tested" craftsmanship tricks are disparaged just because someone has no idea.

The strip also fits into the ArmeLeute Bauhäuser that are constantly being discussed here.
It's always great when "tried and true" craft techniques are devalued just because someone has no idea

Is it just me or are you always this grumpy?
It reminds me a bit of people who walk around all day at work with a sour face but still keep showing up. As if they were being forced

But be that as it may, I don't understand your "expertise". No, such a decorative strip simply doesn't visually fit into the modern, angular, anthracite-accented building that you call an ArmeLeute Bauhaus. At best, you can only make it look good as a stylistic break.

Is it actually me or are you always so grumpy? Reminds me a bit of people who walk around at work all day with a sour face but still keep showing up. As if they were forced to

Not at all I am extremely calm and therefore question many things, especially the pub talk slogans The better my mood, the more critically I question. Trim strips ... by now it was probably about corner trims (there are right-angled ones too) fit just as well into the look as the curved staircase. The external appearance of my quoted poor people’s Bauhaus-style houses, by the way taken from the quote by #20, are by no means Bauhauses where you can be eccentric.

Comes across completely different to me. But now I know how I have to interpret that.