Just built a couple pieces of furniture and they painted up nice all except on some of the insides while spraying I got a slight amount of overspray on the finish and it isn't as slick as the rest. Queston I have is could I lightly buff over this to smooth out the finish?

I was shown to try rubbing with a brown paper bag to smooth out roughness. I was surprised how well it works.

While the paper bag trick can work well it also depends on the timing and the type of finish. I mostly use conversion varnish. And if there is a rough spot you need to get to it pretty soon. After about an hour if you feel your parts for any over spray and you find some do it then. You won't get it glass smooth no matter what, but because of the cross linking of CV it will pull the roughness flatter and in a day or so it will feel even smoother.

As for softer finishes like pre-cats and nitrocellulose you might have to be aware that the paper bag can put scratches into your finish if you have a higher sheen on them that might not go away.

A paper bag is approx 2000 grit I've been told.

I've had success fixing rough finishes with the white 3m pads. the other colors are too rough. Boat guys around here use them on glossy topcoats to bring the shine out.

Jamie’s where do you get these pads?

3M makes some 6" foam pads for the RO sander. 500-4000 grit. But they will change the look of the finish while smoothing things out. The off the gun finish that you have and then you rub them out to take off overspray or whatnot will have a different look even if you match the sheen.

Sometimes you can get away with it. Edges of face frames or doors are places it's easy to get away with. The face of a door might not work unless it's a lone door and you can't compare it to something right next to it.

I buy then at a local marine supplier. But they are widely available. id sart with the finest (white). A metal supplier might also have them locally since they are used to polish that too.
https://www.3m.com/3M/en_US/p/d/b40066283/

3m hand pads