Indeed. A final hand sanding is a must, bringing you closer to the wood, looking and feeling for blems, splinters, and sharp edges.
Do you wipe the entire project down with lacquer or paint thinner to check for blems and degrease it? It can be a godsend.
I've prefinished a few projects prior to assembly, and that can be very handy, too.
-- Some people are like Slinkies ... not really good for anything, but you can't help smiling when you see one tumble down the stairs.