This process is demonstrated in the painting below.
Drying oil painting in the sun.
6 mix your paint with a solvent like turpentine or liquin.
To minimize debris getting in but so that the air can flow through.
Buy some commercial paint hardener or dryer to dry paint in a hurry.
Stir it periodically to hasten drying.
Avoid extreme heat like hairdryers as this will only make the process worse.
A couple of other things to think about that.
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.
I typically find this is not such a good method as the paint dries too.
Pour paint from a full can into other cans or containers a little in each so it dries quickly.
This layer of paint dries quickly within 24 hours.
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.
Two paint using thin layers and washes which will dry reasonably quickly.
This will make your paintings dry in a day or two compared to a week.
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.
As you may have guessed from the prior answers drying an oil painting in the sun is the wrong thing to do.
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.
Combine linseed oil with the paint on your palette.
One leave the painting to dry in a well ventilated open area where air circulates a fan helps.
Bugs will get stuck to it.
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.
To speed up the drying time you can turn on a.
Pour some oil about an inch into a wide dish cover it with a propped up lid i e.
Also paint is slow to dry in a cold environment so a warm room is preferable.
Use an alkyd medium with your colors.
The sun will take away the color.