I am uncertain what to do with interior surfaces of a piece of furniture I am making.

Is it beneficial to leave the interior surfaces of a dresser (making a Mass High Boy) specifically the case sides, runners, guides and kickers bare wood or is it wise to put on a few coats of shellac?

Two isseus I keep hearing about.   1/  Well if you do not apply a finish to the interior surfaces of a carcass then wood will absorb moisture on the unfinshed sides more so than the exterior thus cause warping perhaps AND 2/ that applying finish to runners and guides and kickers allows the drawers to move more smoothly.

The runners, guides, and kickers on this piece are pine, and interior surfaces some maple and poplar.

Seems to me period pieces left these surfaces bare and unfinished.   I have made pieces and left the runners and guides bare and they worked fine and actually on some pieces which I finished the runners with shellac when it is very humid like in hot summer despite the shellac they get “sticky”

I have the bottom to the MAss High Boy comeptled wit the excopetion of the top so it will be easy for me to finsih the interior now.

Your thoughts