Judder said:Quick dumb question - what does PU refer to - Porsche Undercarriage :?:
PolyUrethane i.e. the material it is made from.
As matter of interest, my front splitter (996.1 Cup Aerokit aka GT3) was quite scratched when I bought my car so I rang my local OPC about a month ago and they quoted £109 inc VAT and delivery to replace it. A year ago it would have been £50!
Decided a new one was only going to look scratched again in a matter of months, so I just smothered it in "Back to Black" instead and it looks (almost) like new.