It is very easy to care for Decorative Aluminum Signs. Simply wipe the designer signs with soap and water using a soft cloth. If your aluminum sign has a protective laminate, you may use a citrus-based cleaner with a cleaning mix of 70% isopropyl alcohol and 30% water. Cleaning the sign with a small amount of cleaner using a fresh cloth will remove all the dirt, grime, harsh winds, rain, and mud from the decorative signs. To prevent bending, denting, or warping of signs, do not install them where heavy winds could blow them into other objects.