With what to paint over joints?

Right, why would you need a forum if you can inform yourself.
It could have been that you have first-hand experience... my goodness

True, why do you need a forum if you can inform yourself.

It could have been that you have first-hand experience... my goodness

No, then I would have written that after all

We have now decided on Grout Pen. It comes from England and is available on Amazon. It works very well and also looks good. I cannot say anything about the durability yet, but according to the reviews, the color holds up very well, even in bathrooms.

Solution found! We have now decided on the GroutPen. Comes from England. Works very simply and is perfect. - available in two different sizes - dries very quickly - clean application, no smearing - different thickness tips available, recommended to buy replacement tips at the same time, on the rough surface they do not last as long as there is still paint in the pen - intense color - covers well - even mold resistance is included - after 2 days even cleaned with a steam device, no damage at all Available on Amazon or Ebay. Be sure to compare prices, there are extreme price fluctuations