I got the girlfriends done in mint green (RAL 6019 I think) with metallic laquer, which is as close to metalflake as you will get at Armortex, Dayno... Certainly aint NJS style triple flaked glitter bomb effect, if that's what you were angling after!
The metallic glitter / flakes are pretty small, and defo show up / work better on her green, than they do on a lighter colour. i.e. my white frame.
Edscoble's missus bike...
http://static.londonfgss.com/attachments/11665d1246358502-photo.jpg