Thanks, everyone, for your replies, and your speed!
I'm now going to 'fess up to a totally stupid thing I've done!!!! (I should point out I'm an Institute of Advanced Motorists member and as such should know better!!!!!!!). I've kerbed on of my black Zenga alloys (yes, already, I know, dooh!).
My only excuse is that I'm not used to low profile tyres like the 17" ones on my Advance. I was wondering if there's a particular shade of grey that will do a good covering job. Any thoughts, anyone?
Thanks in advance (no pun intended)
Alan