Given the faff of wrapping that, or touching it up, or getting a bodyshop to quote to paint it - I reckon you may be best going to VW to find out the cost of a new one.
I only comment on this as there was the infamous 'triangle' on the mkiv rear door that used to bubble up. Really cheap to replace, but involved a little bit of work to replace. I found it easy to do with the right tools and a bit of time...