Some grafitti has been spayed on a nearby wall overnight and I'd like to hasten its removal.
It's constructed of "blue brick" which it fairly smooth and I'm told is extremely hard.
I believe that a problem with applying paint stripper to brickwork is that it can be absorbed (together with the paint) into the bricks and makes matters worse.
Is blue brick porous in this way or can I apply whatever I like with confidence?
This happened a couple of years ago and it took about 6 months for the grafitti to disppear through natural weathering.
It's actually a railway wall and so not strictly my responsability though it does reflect badly on my property. The road is faily busy and I don't really want the humiliation of scrubbing away at it for ages while watched by passers by. So if there is something I can slap on or spay on in a couple of minutes that would be great. I don't expect instant removal, but something that would get rid of it in weeks instead of months would be a great help.
Any suggestions?