Sounds about right, but I prefer 1200 and 2000 as well for the mirror shine effect
Ok so now I'm gonna kill everyone here with a modem:
Before I started (Tarnished

)
180 grit:
320 grit:
600 grit:
1200 grit:
2000 grit:
And this picture shows that there is indeed LOTS of micro-irregularities for the AS to fill:
And everyone with a small screen resolution