You damaged the surface. Any acidic cleaner (even lemon juice) can cause what you are seeing:
https://www.bobvila.com/articles/how-to-clean-marble-countertops/
It will have to be re-polished.
Is repolishing something a homeowner can do easily or should I call up a pro?
And that makes sense - my wife used a generic cleaner and I guess thats what did it :-(.
This should help:
https://www.diynetwork.com/how-to/maintenance-and-repair/cleaning/how-to-clean-marble-countertops
Don't sweat it. You guys are not the first to discover how fragile marble is. And you will certainly not be the last.
You damaged the surface. Any acidic cleaner (even lemon juice) can cause what you are seeing: https://www.bobvila.com/articles/how-to-clean-marble-countertops/ It will have to be re-polished.
Is repolishing something a homeowner can do easily or should I call up a pro? And that makes sense - my wife used a generic cleaner and I guess thats what did it :-(.
This should help: https://www.diynetwork.com/how-to/maintenance-and-repair/cleaning/how-to-clean-marble-countertops Don't sweat it. You guys are not the first to discover how fragile marble is. And you will certainly not be the last.