the spoiler has been re-done already, and has come up fine and not faded back at all. But, i am going to get them both re-done at some point anyway, will look nice with a fresh set of laquer over it
No worries, just been recommended by a couple of retailers and some bodyshops to do this to new bonnets and second hand ones as you never know what is on from the factory and what has been added at any point.