Chevy & GMC Vans

The plastic skid material is UHMW-PE...Ultra High Molecular Weight Polyethylene...if there was ever a plastic that could be said is "as strong a steel"...it's this stuff.
With one MAJOR advantage...it is self lubricating. So even running along a rock tip...it naturally allows sliding. Metal wants to dig in.
I hope to be testing this stuff as skid material for our vans this yr.

UHMWPE & Delrin are commonly used in the marine industry
on aluminum boat hull bottoms for rapid beaching.
-Great product.

They use that stuff to line the inside gravel truck boxes too. It stops the soils from freezing to the inside of the box.

Peter