I have a commercial building with 1/4" plate safety glassed on a store front that has been graffiti with paint, scratches and acid edged. I could scrape off most of the paint but those paint embedded in the scratches and acid edge are hard to remove. I've tried to remove it with a little high speed rotary tool fitted with a wired wheel and a small buffer - very little progress, will take hours. I will try with my 7" buffer with some aggressive car polish next time. If that doesn't work I will use lacquer thinner. Any other suggestions?
The city already send the owner three nasty notices about removing the graffiti or take them to court for non compliance, paid all fines, graffiti removal, court cost, lawyer's fees, etc. I've been cleaning graffiti (I'm the maintenance guy) once every two weeks on that building for the last 20 years. Every two weeks doesn't seem fast enough for the city and they don't return phone calls or reply to mails requesting more time or exactly what is required for compliance. Seems like the city is more interested in punishing the property owner (more revenue) than catching the taggers. Are graffiti laws in your city this harsh or they give you a little more leeway and work with you?