Just stuck this on another forum but here goes - very riven/rough York sandstone floor which has been discovered and has alot of the screed knocked off it but paint and bitumen is on it and its a rough floor. The plan was to use a coarse grit honing powder and medium stiff brush with high alkaline. Wondered if tynex brush would help - Mr A Martin thinks not but I side tracked him into talking about something else before he properly answered the question (sorry) but it seems to be too severe for the job? The issue with these floors is that the ones round where I operate tend to be quite coarse grain so naturally rough and have a riven surface with layers that flake off during cleaning - not a problem when that happens during the brush stage but it often happens after the water has had enough time to penetrate under the top layers. Thought that a more brutal approach could be used as these floors are very difficult to damage hence the thought of tynex brush - What about these diamond brushes? The other areas in the house are actually flat sandstone in the main, its just the kitchen is rough as hell. Any thoughts anyone?
