Problem with the block administration/washing the concrete ‘floor’

Hello,

Do you know any magic tricks/chemicals that will help me clean a concrete floor?

In general, the matter comes down to my average-low intellectual management of the block I live in. A few years ago, the basement was renovated, they saved money on tiles in part of the basement, leaving practically bare concrete, painted with some shit.

Since I keep my bike in the basement, there were tire marks on the shitty concrete (exactly like on the famous Czaskoski Bridge). The administration must have been bored and decided that I had made a mess by burning rubber with my bike in the basement and that I should clean it with a brush and white spirit.

Even though I thought it was a shitty idea, I didn’t want to deal with them so I listened and did what they wanted.

And now, instead of the narrow traces of bicycle tires, there is a large, blurry stain from scrubbing with white spirit.

And now it’s really gotten to be a shitty place, hence my question, do you know any trick to get this sorted out somehow, so that I don’t have to deal with these idiots any longer. Knowing life, I’ll soon hear that I’ve ruined the entire floor and the entire basement will have to be renovated at my expense xD

Regards