How to Care for Oil Paintings
Oil paintings can last for centuries, but they are sensitive to light, heat, humidity, dirt and handling. This guide is for owners of family paintings and collectors who want to keep their paintings in good shape with simple, safe habits, and to know when a problem needs a professional.
Choose a safe spot to hang it
Where a painting lives matters more than almost anything else you do. Look for a wall that is:
- Out of direct sunlight, which can fade colors and dry out materials.
- Away from fireplaces, wood stoves, heating vents, radiators and air conditioners.
- Not in a kitchen or bathroom, where grease, smoke and steam collect.
- On an interior wall if possible, since exterior walls can be colder and damper.
Avoid storing paintings in attics, basements, garages or sheds, where temperature and humidity swing widely.
Keep conditions steady
Canvas, wood panels and paint layers expand and contract as temperature and humidity change. Sudden or frequent changes can lead to cracking, flaking and warping. You do not need museum equipment, but aim for moderate, stable conditions year round, similar to what is comfortable for people. A simple hygrometer can tell you if a room is unusually damp or dry.
Mold can grow in damp conditions. If you see fuzzy spots or smell mustiness, move the painting to a drier area and contact a conservator.
Handle with care
- Wash and dry your hands, or wear clean cotton or nitrile gloves.
- Carry the painting by the frame, with one hand underneath and one at the side, never by the top edge.
- Never touch the painted surface. Skin oils can leave marks.
- Do not press on the back of the canvas, which can cause dents and cracks on the front.
- Move one painting at a time, and clear your path first.
Dust gently, and only if the paint is sound
Look closely at the surface with a light at a low angle. If you see any flaking, lifting, blistering or loose paint, do not dust it at all. Leave it for a conservator.
If the paint is stable, you can occasionally dust with a very soft, clean brush, such as a soft artist's brush or a makeup brush reserved for this purpose. Use light strokes and work from top to bottom. Do not use feather dusters, which can snag, or cloths, which can catch on raised paint.
Do not try home cleaning methods
You may hear about cleaning paintings with water, soap, bread, potatoes, saliva or household cleaners. Avoid all of these. They can remove or damage the varnish and paint, leave residue, and permanently reduce the painting's value. Darkened or yellowed varnish, grime and smoke film can often be safely treated, but only by a trained conservator who can test and control the process.
Watch for warning signs
Check your paintings now and then for:
- Flaking, cupping or lifting paint.
- Tears, holes, bulges or sagging canvas.
- New cracks or cracks that seem to be spreading.
- Mold, insect activity or water stains.
- A loose frame or failing hanging hardware.
If you notice any of these, take a photo, avoid touching the area, and contact a conservator.
Find a qualified conservator
Look for a conservator who specializes in paintings. Professional conservation organizations offer directories, and museums can often suggest names. A good conservator will examine the painting, explain what they see, give a written treatment proposal and cost estimate, and document their work with photos. Be cautious of anyone who promises to "restore" a painting quickly without an examination.
Keep records
Photograph each painting front and back, including labels and signatures, and keep any paperwork about its history, purchase, appraisals and conservation work. These records help with insurance and future sale, and help a conservator understand past treatment.
Quick checklist
- Hang away from sun, heat sources, kitchens and bathrooms.
- Keep temperature and humidity moderate and steady.
- Carry by the frame and never touch the paint.
- Dust only stable paint, with a soft brush.
- Skip all home cleaning remedies.
- Call a paintings conservator for damage or dirty varnish.