Colour match for alloy wheels

The alloys on my 1998 V8i are now showing signs of age:



Would any one know the colour code or pantone for the grey that is used on these?

I will have a go with some nitromores or paint stripper then given them a re-spray, polish and re-seal with clear laquer

Unless someone has some advice to offer?

I use Rover Stone Grey Metallic as a touch up on the marks that a wheel brace leaves behind.

Thanks for that