Whats better for sliding on, plastic or metal? Cause a lot of media I see of summer rails and things the people are sliding on PVC pipes. PVC?! NO WAY PVC! Yeah. Doesn't it get all chunked up from your edges then makes you go BOOM on the ground cause its all chunked up from your edges? EH EH EH EHDGES?! Yeah so why do most people use PVC for their summer rails?