I have got some white paint on some bricks & granite flag stones. I soaked a bit of white spirit on then went at it with a wire brush. It’s not shifted it at all. What can I try next some kind of acid?
If its granite paving you wont damage it with a scraper.
Bricks, as above try paint stripper or a solvent for oil based.
Water based will need a different approach, pressure washer and detergent DO NOT USE ABRASIVE, light wire brushing if its a hard brick, semi engineering etc
Use a propane torch and scraper to get rid of most of the dried paint. For Heaven's sake don't overheat the stone/bricks. Then grind off what's left with a stone grinding disk. As an alternative, look up "graffiti removal" on Google.