Hi,
As mentioned you cant apply this to the whole car and come back and buff apply to panel and remove.
David, i find it gets about 6 weeks before the looks start to go and a bit long before the beading. This wax does have a good Zymol look like a thing layer of wet ice.
One thing you can do is put Optimum Opti Seal over the Carbon, it makes very little difference to the looks and will lock in the shine for nearer 12 weeks, atleast in my weather.
Geoff