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Bit confused by the picture, It looks like its the red stuff that's flaking up a bit. Is it that you are trying to remove? I guess media blasting would be the ideal?
chiroshi-
Yes, on reflection it’s not that clear.
The red paint is what I want to remove, but in doing so it’s evident that there’s a thin layer of cement over part of the stone. It could be covering up all manner of defects, but I’d like to try and remove it and see the condition of the original stone.
South of the pink line is stone, north is cement.
I could try an SDS but I’m weary of taking chunks out of the stone. Maybe I’ll try a bolster first.
Trunkie
It looks like the sandstone threshold stone on my front path has been partially covered with a thin cement (I think) screed at some point. What’s the best way to remove this? I’m assuming mechanical?
I tried briefly with a ro and belt sander. The belt was more effective but I only have 1 worn belt so didn’t get very far. Before I go pick up some new belts is the anything more effective I could try? I’m not looking for a faultless finish, some wear and patina is fine.