[basjoos]

The coroplast double side skirts on my car are designed to flex independently of each other when they encounter a speed bump or high curb and it doesn't damage them a bit when they do scrape. When I designed and installed them, I deliberately made them too long and painted them black. After driving around for a few days, I could see where the paint was abraded off by pavement encounters. Those wear marks served as a guide as I trimmed them down to where they only made occasional contact with the road. Now 6 years and 180,000 miles later, they show no abrasion loss from the occasional scrapes accumulated along the way.

You'll need to keep a coat of paint on any coroplast that is exposed to direct sunlight, otherwise the sunlight's UV will cause the coroplast to become brittle and crack within 2 to 3 years.