So after removing them I set about cleaning them up, strapping them to the top of the wheelie bin to hold them down and started wet flatting them with first 600 grit then 800 grit then finally 1500 grit then polished them back up to a showroom shine with the machine polisher first with the course compound and hard polisher head then with the soft head and fine compound and they now look great IMO.
some pics
Tools and bits used to clean them up

Before

After wet flatting

After machine polishing

A quick comparison close up before and after


Now all I have to do is CUT them as there post 2002 to open them up to fit the SMD rings from my old lights then bond and seal them back up then there ready to be fitted
looking like new
