[mrJB]

Polyethylene will buff and/or sand out to a certain extent, just a lot of work and will never get a supershine. It will only get the very lightest scratches. You can get somewhat deeper scratches by scraping, either with a cabinet scraper or razor blade, but then you are taking off some material.

I've done it - scraped, wet sanded, buffed with a buffer, on and on. Just depends on how much work you want to put into it. A heat gun will put some shine back into it but there are potential risks...

My $.02, clean it up, put some sacrificial tape strips on the wear area, and use some plastic protectant on it Try to keep it nice from this point on and wash it down after every outing...