The government agencies will often provide other painting and cleaning supplies. The vest identifies you to the public and police, and it acts to alert people and drivers to your presence. We wear it for safety and identification. Chances are you may pick up new volunteers who see you working and stop by to say hello. Cleaning Smooth Surfaces Test an inconspicuous area of the surface with your cleaning material.
Most modern signs clean quickly.
I like to start my cleaning with soap and water first and then proceed to solvents. Contact vendors responsible for these devices and encourage the vendor to use more durable methods. Read the instructions on the can. Some solvents work better if applied with a cloth. Others must be sprayed on the damage and allowed to sit until the paint has absorbed the solvent.