Oil-based paint offers a glossy, durable coating and is ideal for certain surfaces where latex paint just isn't a good fit. Unfortunately, oil-based paints can take a long time to cure, and because of this, they tend to emit unpleasant odours that can fill an entire room. Fortunately, you can hasten the curing process through a few simple steps.
Apply a mixture of one part vinegar and 16 parts water to the dry, newly painted surface using a rag. Dry the surface with a dry rag.
Promote curing by blowing a fan on the painted surface for at least three hours a day for at least two weeks.
Place the item in direct sunlight if possible for at least three hours a day for at least two weeks. If the item is too large or otherwise impossible to move, direct a fluorescent lamp toward it for at least three hours a day for at least two weeks.
Run a space heater or dehumidifier for a few hours a day if the painted area or object is in a humid location. Moisture in the air can prevent oil-based paint from curing.
Monitor weather conditions closely. Do not leave the item outdoors over night or during conditions of high-humidity.