How to align a slit in the facade that was plastered afterward?

Hello everyone,

I had cables retroactively installed into the EIFS insulation by a painter and electrician. The painter first chiseled the facade and later, after the electrician’s work, closed the chisel grooves. He warned me that you could still see them later if you look closely and that it was impossible to completely conceal them.

In the photos it may look subtle, but in reality the closed grooves can still be clearly seen. Otherwise, I would try to blend it myself somehow. I think the problem is mainly that too much plaster was applied around the groove, which stands out like this. So it would need to be sanded down a bit. Is that even possible with this kind of facade plaster? It’s not smooth after all. Afterwards, sanding might look worse than before. Does anyone have any ideas on what can be done to make it look visually better? The painter said it couldn’t be done better, but maybe with more "effort" it could work somehow...

Thanks to you all.

Honestly? If you’re not a gifted DIYer, then leave it as it is.
“[Schleifen]” is out of the question here.

I had almost suspected that. Smearing some rough plaster into the too deep spots probably won't hold either, right? Then at least one could somewhat even it out...

No, you won't manage that. The craftsman didn't do a bad job.

Honestly? If you're not a gifted DIYer, then leave it as it is.

I'm upgrading to "DIY king" (and of course, the product we're looking for has the order number 6100 at Binford *duckandrun*).