any advice on Watanabe colour code?

I'm in the process of colour matching my wheels at the moment[front and back are different], and have been having a hard time trying to find the exact colour and finish I want.

Basically I want a factory colour 'magnet'

'watanabe - magnet'

or whatever the colour is on ericB's wheels

http://www.davescholz.com/public/webgallery/pages/themoneyshot.html

The above samples seem to be a satiny, matt finish with a very dark bronze.

The current colour of my wat's at the moment are an interesting dark grey/bronze but I believe they have been painted over by previous owners.

I can either go for sandblasting and powder coating, or just painting. The closest powdercoating colour I can match is:

dulux 59003- metropolos bronze pearl [matt] if anyone needs it for future reference.

Cheers