[VroomVroom]

I think you're on the right track. The sealant will make the metallic pop. If you like it - and you will - apply a second light coat for durability. If you think it needs a bit of wetness, add the carnauba.

I agree about the use of a glaze, at least in my minimal experience. The first time I used RMG on a vehicle that wasn't black, I was knocked out...it appeared to make the Audi red a little darker and a bit more wet.