Sorry but this is bollocks. If it's just UV damage then yes, you can just scrub it harder with pastRX and get the fading off. If you've got lots of tiny stress marks in the clear plastic then there is sod all you can do about it.
Sorry but this is bollocks. If it's just UV damage then yes, you can just scrub it harder with pastRX and get the fading off. If you've got lots of tiny stress marks in the clear plastic then there is sod all you can do about it.