Felt tip pen removal from stone

[Olderisbetter]

We had some cans of graffiti removal spray from a mate at the local council it worked ok but i found it was better if you soaked it on and placed a absorbent pad on top and left for a long time.

 

[Seano]

M.E.K Methyl Ethyl Ketone, used to use it for stripping aircraft etch primer, just make sure you have all the windows open, there isn't much it wont shift,works a treat

https://ecolink.com/info/what-is-mek-methyl-ethyl-ketone/