This is a great product!!!

The wall is about 100 foot long or so and I have 3 small spots to clean off to but they are real small. Now from what the company told me when I ordered it that it would take all of the paint off including the stuff they painted over the tag with. I'm going to do a test spot and see how good it looks as I have never used this stuff before but I have seen videos of it being used and it worked good.
 
I asked before if it was bare masonry. That is painted masonry. Big difference Terry. I could be wrong, but I have never encountered masonry that is colored like that out of the factory. 99% chance the wall is painted with a latex product. If so, even without Taginator the paint will come off. No way are you going to get the area of paint the City painted over the graffiti and keep the existing color coat intact.
From that picture you posted, looks like the overcoat paint is already lifting, or the undercoat, or maybe the masonry is in bad shape underneath.
I owned a painting company in Chicago for many years. From the looks of it the overcoat of paint and any other paint that is failing needs to be removed (15 degree tip should work, no chemicals), wall allowed to completely dry (maybe 48 hours, depending on the weather, humidity, ect) primed then repainted.
 
It is not painted I looked it over, the only paint is the stuff they put on it, we have that color masonry all over around here and it is baked into the brick. I think somebody has sandblasted it before or it is just weather pitting going on. But I know it has no paint on it, but the paint the city put on it. Maybe I will try a test spot without chem's and see how good it comes off first and then if need be put them chem's on it.
 
It is not painted I looked it over, the only paint is the stuff they put on it, we have that color masonry all over around here and it is baked into the brick. I think somebody has sandblasted it before or it is just weather pitting going on. But I know it has no paint on it, but the paint the city put on it. Maybe I will try a test spot without chem's and see how good it comes off first and then if need be put them chem's on it.

If the color of the block is factory color, which means the color is added to the concrete that the block was made of, then Taginator will work just fine. You may need to do the entire wall, to "blend" the area tagged in with the rest of the wall.
 
Well I will know next week when the chems get here :eek: :D I hope I don't have to do the whole wall, Thanks for the help now all I have to do is give it a try and see how it turns out and I will take some after pics. Nigel I don't have a video cam so I can't takes vids of it.
 
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