Signs may accumulate dust, debris, or algae between preventative maintenance visits (cleaning service). To address the issue, you may choose to perform a basic do it yourself cleaning of the exterior of the sign.

Guidelines for DIY Cleaning

Use only low-pressure spray (No high pressure or direct spray)
Gently wipe exterior of sign using Non-abrasive soft cloth, clean water mixed with gentle detergent such as Simple Green. (Follow detergent manufacturer’s mixing instructions)
After cleaning sign, rinse with clean water to remove residue traces

AVOID THE FOLLOWING, AS THEY CAN DAMAGE SIGN

Abrasive cleaners (Avoid anything with grit, harsh chemicals, etc)
Course brushes or cleaning cloths with grit or abrasives
High pressure spray

To clean silicone sealant to keep it doing its job for longer, you’ll need to follow a few simple steps. All you’ll need is a non-abrasive cleaner, some hydrogen peroxide, rubbing alcohol, and some soapy water.

Here are some steps you can take:

Clean the surface: Use a non-abrasive cleaner, like soapy water or a cleaning solution. Apply it with a soft-bristled brush to clean the sealant. Avoid using harsh chemicals, such as bleach or ammonia, as they can damage the silicone. Use rubbing alcohol and hydrogen peroxide mixed with baking soda to prime the surface.
Dry the sealant after cleaning: After cleaning the silicone sealant, dry it thoroughly with a clean, dry cloth, paper towel, or towel. Moisture cause mildew and mold growth. Long-term this damages silicone and compromise its effectiveness.
Regular inspection: Check the silicone sealant for any signs of wear or damage. If you notice any cracks or gaps, reseal them immediately to prevent water from leaking through.

It’s really as simple as that! If you keep up with regular maintenance, this quick process should be enough to keep silicone sealant looking and functioning well in the long term

Never lean a ladder against ACM. It may dent the panels, which are very expensive to replace.
Do not use wire brushes, steel wool, abrasives, sponges, or anything likely to scratch the painted surface.
Some cleaning materials can damage the painted surface, such as Acetone and Paint Removers.
A power washer with a pressure setting of no more than 3300 psi should be used. A higher setting could remove the painted surface or the caulking in the joints.
Avoid cleaning ACM surfaces when they are very hot or very cold. Cooling the ACM with water before applying the detergents will help to keep it from drying too quickly and streaking.
Do not use hot water in the pressure washer as this will burst most standard pressure hoses.
The pressure washer should be located close to the hose bib and after the de-ionizer canisters. Water pressure from the filters to the pressure washer is critical and, at most, should be no more than 100 feet from the filters. Over 400 feet will usually take good water pressure down to poor pressure and that will damage your pressure washer.
If working on a roof area, don't use any sharp objects or drop items on roofing materials.
Always watch forecasts for inclement weather or the possibility of lightning.
The person on the ground should be watching to keep staff and customers away from pressure equipment and hoses. Mark the area being worked on with cones and caution tape.
It may be necessary to go on the roof of a dealership to clean the back of the Portal and the parapet ACM. Care and consideration should be taken when walking on the roof because most roof surfaces are rubber or vinyl.