Been asked to clean a massive flatted complex, Ground First and Second floor, probably 2 days work. On closer inspection when pricing i noticed many windows had huge amounts of what looks like mineral deposit staining on the glass.
I got the MDR from the van and tried it on a ground floor window to see if it would shift. It made little or no impact. This job would be a good earner if you could only shift the staining.
Does anyone have any suggestions on what i might try to remove it.
Looking for a quick fix otherwise will turn the job down.