Inquiry (采购产品): Anti-graffiti coatings planning to install concrete precast tunnel and cast in place concrete wall with pattern that we would like to keep graffiti free. What limitations on surface roughness are there? **** Hidden Message ***** Thomas Cordell 27401 Company: City of Greensboro E-mail: thomas.cordell@greensboro-nc.gov **** Hidden Message ***** thomas.cordell@greensboro-nc.gov