Not direct sunlight due to fading and too much darkness will cause it to yellow.
Drying oil painting in the sun.
Bugs will get stuck to it.
Buy some commercial paint hardener or dryer to dry paint in a hurry.
Pour paint from a full can into other cans or containers a little in each so it dries quickly.
Add absorbent materials such as sawdust or cat litter to the paint if there is more than just a little left.
After that i embrace the slow drying time of oil paint rather than try to avoid it.
How to make your oil paintings dry quickly.
Oil paintings need daylight.
Since linseed oil dries faster than other kinds of oil mixing a little extra linseed oil with the paint on your palette can help speed the drying time of your painting.
Avoid extreme heat like hairdryers as this will only make the process worse.
Two paint using thin layers and washes which will dry reasonably quickly.
To minimize debris getting in but so that the air can flow through.
However there is an important exception and that is when an old painting is suffering from discoloured or yellowing of the varnish layer.
This process is demonstrated in the painting below.
The sun will take away the color.
This will make your paintings dry in a day or two compared to a week.
Combine linseed oil with the paint on your palette.
Stir it periodically to hasten drying.
When i start an oil painting i will usually thin the paint using odorless solvent so that it becomes a thin wash with a watercolor like consistency.
Use an alkyd medium with your colors.
This layer of paint dries quickly within 24 hours.
Also paint is slow to dry in a cold environment so a warm room is preferable.
A couple of other things to think about that.
6 mix your paint with a solvent like turpentine or liquin.
One leave the painting to dry in a well ventilated open area where air circulates a fan helps.
I typically find this is not such a good method as the paint dries too.
As you may have guessed from the prior answers drying an oil painting in the sun is the wrong thing to do.
To speed up the drying time you can turn on a.
Use alkyd white instead of normal white to mix with your oil paints.