I'm looking at getting a set of brand new steelies (5x) powder coated "graphite" or "satin dark grey".

1. Can anyone recommend a powder coater in Sydney?
2. Would I need to sand/grit blast the new rims?
I've had some say don't blast as it marks the surface and can show through, others say you need to pickle the surface for proper adhesion...

Cheers, MM