It is never recommended to use products that are not designed as a finish to be used as a finish. Mineral oil is not designed as a finish. It does nothing to seal and protect the wood. And as mentioned, mineral oil never fully dries. It might be appropriate for cutting boards and utensils, but that’s it. Any product designed as a finish will become food and child safe once fully cured, not necessarily dry, but cured. In my opinion, any project that will be handled must have a topcoat. Wood will soak in fingerprints and skin oils and dust and dirt if not topcoated. Appropriate topcoats include Lacquer, shellac and Polly.
Other products some folks use as a finish, but are not designed as a finish are orange oil and lemon oil. These products are designed as cleaners and polish’s.
For me, using an oil is used to bring out the natural color and grain of the wood. Since I use mostly hardwoods, using an oil greatly enhances the beauty of woods like Walnut, Cherry, Oaks and even Maple, but most hardwoods are enhanced.
My procedure is as follows. I soak all my scroll saw projects in a 50/50 mix of boiled linseed oil and mineral spirits. The oil brings out the natural color and grain of the wood, and the mineral spirits thins out the oil, allowing it to flow easily around the project, and acts as a drier. I use an on old metal baking pan for this. I let it soak for a few minutes. Then, I remove the project and wipe off the excess oil with blue shop towels. I set them on baking cooling racks to dry. After the oil dries, usually in 24-36 hours, I apply Deft semi gloss spray lacquer. Usually two or three coats. The lacquer dries fast. Depending on humidity, I can apply two or three coats in about an hour. After the lacquer is dry, if it has dust nubs, I’ll rub out the finish with a folded piece of brown paper bag. It’s like using 2400 grit sand paper. I store the oil mix in an old glass mason jar.