Paul...that is incredible! Unbelievable! Has any of the good paint seem to be affected in any negative way?
Steve, I didnt see any loss of paint color at all, no fading. I imagine different paints on different signs might fade though.
Once the sign dried more, like a day or more, there was some white residue left behind on the formerly rusty areas (not all over, just in some spots). Seems to partially come off using wax and grease remover. Probably a residue from the chemical reaction on the rust.
I wasnt going to matte clear this sign, but think I might, if I do I'll add a picture. I think it'll look better. At this point I've added a cedar frame and did some sign straightening... you can see the white residue on the second picture.