You can expect wear lines on the cutter in a few hundred feet. In MDF,
ply, teak, and other more abrasive materials it could be worse.
Notwithstanding, sanding is typical after a simple roundover to remove
the mill marks, splinters etc.
If this was going to be inspected by the commander in chief of
Routerdom, and was expected to be perfect, I'd:
Buy a Chinese 10$ bit, let it cook itself on the first 90% of the cut
and let the Infinity take the last 10%, The White bit can easily stand
this modest bite for 1000'.
More on cutters: http://www.patwarner.com/routerbits.html