Don't worry, if you have soapstone, then it can't be ruined by any chemicals. If you used a concentrated Mr. Clean, I would guess that you stripped off a lot of the previous patina from 2 months of oiling it. You may have to oil a few times to get the same amount of darkening that you had before. I dripped Goof Off all over one time and it took several oilings to really darken the areas to the same color as the rest of the counter. If you washed with soapy water in between the oilings, you may have removed even more oil. For the most part, I have found that washing the soapstone with just hot water and a microfiber cloth maintains the color by not removing any oil from the surface. I would recommend oiling it a few times without using any cleaners in between to see if you can get back to the same level of oxidation that you had before. Did you happen to sand it out? I have read that sanding can also change the tendency to have white spots if you use a different grit than the installer used. My installer told me to use 220 grit to sand it out.

New plants do usually have "store spots." Being out in a rain is the best leaf cleaner. The only time I clean leaves is if/when they get sooty mold/mildew from being under the trees, which won't come off from being rained on. For that I use rubbing alcohol & cotton balls.

I don't see water marks...just nicks and dings. I would say best to strip and start over....and finish with an oil based poly.

THANKS, HO-UZZ812 for that info. I use either the powder or liquid on just about anything and it works like a charm. However, I don't have nickel finishes. That was a uninformed suggestion I gave to OP. Sorry, safemommy. Hopefully, this article will give you better advice. https://homedecorbliss.com/clean-brushed-nickel-bathroom-fixture/