You can wipe the finish (or paint it on). If painting it on, you may need to use a coarser grit like 220 to smooth out, but I can't say that for sure as I have never wiped/painted and have always sprayed.
You can use 220 at any time, but we really only sand to facilitate pore filling and to remove any runs. We use 320 dry (wet sand if needing to sand while slightly soft) and follow up with a grey scotch bright pad afterward. If you have a perfect finish and it has been over 10 hours since the last coat, I would suggest just scuffing it with a grey scotch brite pad. Buffalo hide aka epoxy finish aka Tbird requires very little ruffing up in order to adhere properly.
good luck, bigjim