Along the Bradford route there has been some fairly recent Graffiti Tags. I hope this is only an isolated incident. I am experimenting with a small bottle of muriatic acid. I carefully pour a small amount of acid right on the spray paint marks then grab some vegetation to use as a brush and rub it in. A few days latter come along with some water to wash it off. It is not easy carrying acid in your pack with out contaminating your backpack. It does seem to have some merit though cause it seems to work. Any body got a better idea? Thanks