Has anyone had any success with removing lichen from bricks/patios? We have a brick border around our tarmac drive which is covered in 'chewing gum' white lichen. We recently sealed the drive with drive 'paint' which looks fantastic, but has made the brick border look even worse. We just painted over the lichen on the drive, which may have been a mistake but we'll see!
I'd rather not pressure wash the brick border because I'm worried about blasting away all the pointing (plus the hose pipe won't stretch around to the end of our drive). I've tried vinegar, which did absolutely nothing. Is there anything else I could try? I've read that bleach can be used as well, but I wonder if it'll just be the same as vinegar? I'm not even sure that the lichen is alive and it's so ingrained in the brick that I can't see how bleach will shift it.
My last course of action is to just brick over it wit brick paint and hope for the best! Any other suggestions before I shell out for more paint?!