Oil in the paint in and of itself has a smell. It will gas out onto everything that's around it until it's completely dry which takes a year or more. You will always have some kind of oily smell just like a place that cooks with frying grease or greasy burgers. If you are sensitive to smells, you'll have them with oil paints, and toxicity with many solvents. Some oils have less odor, walnut oil and poppy seed are used, don't yellow, but are slower to dry (can be a good thing), but they don't dry completely "hard" like the painting linseed oils (which go yellow over time). The only way not to have much smell is to use oil paints with a water-based medium that lets you clean the brushes and thin the paint with water.It's always a good idea to have fresh air coming in, especially in winter when you're keeping things closed down from the cold.
