100 grit is really coarse, when I did it I used 220 and sanded it for almost an hour, you have to do it until it looks really smooth and then you apply the polish.
Why would you even comment in this thread then?
I usually just peep the places I've been looking at for a while on google maps to see if they are even worth going to.
You cannot chrome aluminum, well you can but nobody will really do it.
He polished it, I did it to my v1 with a buffing wheel, a red polishing compound, and then cleaned it up with some metal polish that I bought from ace hardware.