I have a customer with a couple dozen 10 mil coro signs that were printed on a UV flatbed. There is one line (2" x 20") that they would like removed (or covered). The text is all black, and not touching anything else. For giggles, I folded a paper towel, soaked with 91% isopropyl alcohol across the line of text, and waited 5 minutes. The UV ink wiped off clean and VERY easy. I got to wondering if there may be some sort of chemical reaction between the UV ink and alcohol.....or FUMES, that I should be concerned about??? I don't want anyone to get sick over my stupidity.