What “the oil painting method” means
There is no single official method for oil painting. Different teachers and traditions work differently. Still, most approaches share a common backbone: prepare a surface, establish a drawing and the main values, build up color in layers, and finish with detail and, eventually, varnish. This guide describes that backbone so you can see how the pieces fit together, with links to deeper articles on each topic.
Oil paint dries slowly compared with acrylic or watercolor. That is a gift, because you can blend and rework for hours or days, but it also means the order of your layers matters more than it first seems.
Step 1: Choose and prepare a surface
Most beginners paint on a pre-primed stretched canvas, a primed linen, or a rigid panel such as primed wood or board. Oil paint should not go directly on bare canvas or raw wood, because the oil can soak into the fibers and the support can deteriorate over time. A primer (gesso) separates the paint from the support. Look for a surface labeled as suitable for oil, and note that many painters use acrylic gesso underneath oil paint.
Step 2: Tone the surface
A bright white surface makes it hard to judge values, since everything you place looks dark against it. Many painters cover the white with a thin, neutral or warm wash, often called a toned ground or imprimatura. It is usually wiped back so the surface is a mid-tone and dries relatively quickly. See our guide to toning a canvas for oil painting for materials and a simple process.
Step 3: Plan the composition and draw
Before heavy painting, decide where the main shapes sit and where the eye should land. Small thumbnail sketches help. You can then draw onto the toned surface with thinned paint, charcoal that you fix lightly, or a pencil. Keep the drawing simple: big shapes and proportions first. Our article on oil painting composition covers the principles worth thinking about at this stage.
Step 4: Block in the underpainting
The underpainting (also called the block-in or lay-in) establishes the main masses and values. Some painters work in a single color such as burnt umber or a gray, which is called a monochrome underpainting. Others block in approximate colors. Either way, the aim is to settle the big structure before you worry about detail.
Paint thinly at this stage. Thin paint, diluted with a little solvent, covers the surface quickly and dries sooner. Getting value relationships right here matters more than color, so see value in oil painting for how to judge and simplify light and dark.
Step 5: Build the color layers, fat over lean
The best-known guideline in oil painting is “fat over lean.” “Fat” means paint with more oil; “lean” means paint with less oil, usually thinned with solvent. Each layer should generally contain the same amount or more oil than the layer beneath it. The usual explanation is that oil paint dries by oxidizing, and if a lean layer is painted over a fatter one, the surface can crack as it ages.
In practice this means:
- Start with thin, solvent-thinned paint.
- Move to paint straight from the tube or lightly mixed with a medium.
- Save the thickest, richest passages for the end.
Your choice of medium affects how fat a layer is. See our guide to oil painting mediums for how linseed oil, alkyd mediums and solvents differ. How you choose and mix your colors also matters, covered in oil painting color theory and mixing basics.
Step 6: Handle the background and the edges
Backgrounds are often treated as an afterthought, but they strongly affect depth and focus. Many painters work the whole canvas together rather than finishing one area at a time. Read more about oil painting background techniques for ideas on keeping backgrounds supportive rather than distracting.
Soft and hard edges are another tool. A blurred edge pulls an area back, while a crisp edge draws attention.
Step 7: Refine and add details
Once the large masses read well, refine drawing, adjust color temperature, and add details and highlights. Tackle the detailed passages last, using smaller brushes and thicker paint. The right tools help here, so check what type of brush to use for oil paint at each stage.
Step 8: Let it dry and varnish
Oil paintings dry to the touch over days to weeks, depending on pigment and thickness, but the paint film continues to cure for much longer. Most guidance suggests waiting at least six months, and often up to a year or longer for thick paintings, before applying a final varnish. Follow the paint and varnish manufacturers’ instructions, because recommendations vary. Varnish protects the surface and evens out gloss, and a removable varnish can be cleaned or replaced in the future. For judging when the painting itself is done, see how to finish a painting.
Working safely
Solvents give off fumes, so work in a ventilated space and consider odorless mineral spirits rather than stronger solvents. Rags soaked in drying oils can heat up as the oil oxidizes and have been known to ignite, so store used rags in a sealed metal container or lay them flat to dry away from anything flammable. Check manufacturers’ safety information for specific pigments, especially cadmium and cobalt colors.
A simple practice plan
If you are new, try a small study of two or three objects on a toned panel. Use a limited palette, do a thin monochrome block-in, then add color in two or three passes. Repeating this on small surfaces teaches the sequence faster than one large ambitious painting.
Frequently asked questions
How do you start an oil painting as a beginner?
Pick a small primed surface, tone it with a thin wash, sketch the main shapes with thinned paint, and block in the major dark and light areas before adding color.
What is the sfumato technique?
Sfumato is a way of blending edges and tones so softly that transitions appear to dissolve without visible lines. It is associated with Renaissance painters such as Leonardo da Vinci and is built up with thin, carefully blended layers.
Can I paint oil over acrylic?
Generally yes, oil can go over a dry acrylic layer such as acrylic gesso, but acrylic should not be painted over oil. In that combination oil is typically the final stage. The acrylic vs oil paint comparison covers combining them.