Two paint using thin layers and washes which will dry reasonably quickly.
Drying oil painting in the sun.
6 mix your paint with a solvent like turpentine or liquin.
Add absorbent materials such as sawdust or cat litter to the paint if there is more than just a little left.
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.
Oil paintings need daylight.
One leave the painting to dry in a well ventilated open area where air circulates a fan helps.
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.
Use an alkyd medium with your colors.
To speed up the drying time you can turn on a.
Avoid extreme heat like hairdryers as this will only make the process worse.
How to make your oil paintings dry quickly.
As you may have guessed from the prior answers drying an oil painting in the sun is the wrong thing to do.
I typically find this is not such a good method as the paint dries too.
Sun thickened linseed oil is a created by exposing the oil to the sun to create a thick syrupy somewhat bleached oil with similar brushing qualities to stand oil.
This layer of paint dries quickly within 24 hours.
Combine linseed oil with the paint on your palette.
In general i agree with what has been said so far its not a good idea to leave an oil painting in full sunlight for an extended period of time this will affect certain pigments.
Not direct sunlight due to fading and too much darkness will cause it to yellow.
To minimize debris getting in but so that the air can flow through.
Use alkyd white instead of normal white to mix with your oil paints.
However there is an important exception and that is when an old painting is suffering from discoloured or yellowing of the varnish layer.
Buy some commercial paint hardener or dryer to dry paint in a hurry.
This will make your paintings dry in a day or two compared to a week.
Also paint is slow to dry in a cold environment so a warm room is preferable.
After that i embrace the slow drying time of oil paint rather than try to avoid it.
The sun will take away the color.
Pour paint from a full can into other cans or containers a little in each so it dries quickly.
This process is demonstrated in the painting below.
Stir it periodically to hasten drying.