Correct colour for 1956 Model 99?

The colour should be NortonPolychromatic Grey. The closest that you will get is (VolksWagon Platin)

I have used the U-Pol paintbrand and it is superb.

Hope this helps, Regards, Paul

Not sure of these people myself as I've not bought from thembut theysound useful?

http://www.rsbikepaint.com/en-gb/colours.php