Well, finally got a few more coats of high build primer with lots of sanding and more glaze filler (to fill sanding scratches) in between. Then came the base coat (three coats - first light, second medium and final dust coat to lay the metallic down evenly):
Then two coats of clear (both medium - wet on wet) - wanted to try and obtain some decent flow to avoid having to colour sand it all. Turned out pretty well although pics don't do it real justice.