I had need to do this to a refinished AE Fox 16 ga. a few years ago and ordered it but never used it. I was afraid, with lack of experience, I'd screw something up. Birchwood Casey Stock Sheen and Conditioner was recommended to me by someone here as an easy to use substitute. I bought a bottle, used it according to instructions, and it worked perfectly.
https://www.birchwoodcasey.com/products/stock-sheen-conditioner-3-fl-oz-bottle.html i doubt I ever use any of it again as I just refinish my shotguns now with a sanded in finish with which it is very easy to control the sheen.