This was simultaneously both Fun and Terrifying, in equal measure...
I noticed that my rear spoiler had started to show signs of (what I thought) was wear along the leading edges, as you can see here:

Following advice from other owners, I had regularly tried cleaning it with WD40 and a scouring pad. Which had always bought it back to a more consistent colour for a while, but ultimately it went back to looking like this.
So today I decided to have a proper look at it - with the view of either sorting it myself, or speaking to someone else to have it professionally done or (worst case) simply replaced.
Having succeeded myself, I've now added a 'how-to' about it, here: How To Clean Rear Spoiler
Some photos from my adventure are below...
Before:

Slight Panic Sets in:

Well, i'm committed now!!

Relief:
