Are you guys saying that a decent DA won't permanently correct the swirls?
On a slightly added note....if you do DA and then get a good wax and it's durable surely you shouldn't see em? Polish with a filler, and then durable wax over the top should effectively seal the polish in, no?
Does Collinite 476 really last anywhere between 6-12 months?
No, we're saying a machine polish should remove the swirls (subject to correct technique and pad and polish combo). However, also saying that to minimise swirls in first place, a good washing regime and mitt will help no end.
If you want to go whole hog then: polish, optional glaze (with filler properties), sealant and/or wax.
Not used 476 so don't know if it lasts that long.