Yes, as long as the previous finish is not lacquer or shellac. Be sure to test the selected colour on a hidden spot to see how it will look over the original finish. To prepare the surface, make sure that the finish is clean and has had all wax and polish removed. Then lightly sand with #180 or #220 sandpaper.
Then thaw meat, add seasoning and press into strips or sticks, and place on trays to dry. Depending on how thick meat is cut, how heavily dryer is loaded, and the humidity, jerky takes from 4 to 15 hours to dry.
Mix the beef/turkey and all the ingredients in a large glass bowl, then cover it with plastic wrap and left it to refrigerate/marinate for about 4-5 hours. Using your Jerky Gun, fill your dehydrator racks, careful not too overlap the slices. After all the raw jerky slabs placed onto my trays run the dehydrator for about 8-10 hours at 145 degrees. The last hour periodically check on the consistency of the jerky. The edges will be the first to dry out. When the center still had a tiny bit of softness to it seems to be the consistency that is perfect to me.