Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (2024)

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1Using Paint Thinner for Interiors and Exteriors

2Combining Oil and Mineral Spirits for Art Projects

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Co-authored byKelly Medfordand Janice Tieperman

Last Updated: March 17, 2023References

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If you’re starting a new art or home improvement project, you might be using oil-based paints to get the job done. While oil paint looks beautiful on a finished product, it can be a bit difficult to apply at first. If you’re working on a residential or commercial painting project, mix small amounts of turpentine or mineral spirits with the rest of your paint. If you’re an artistic painter, mix linseed oil and mineral spirits together to help apply your paint more smoothly to a canvas. With the right ratio of paint and thinning agent, you’ll be on your way to creating a vibrant final product.

Method 1

Method 1 of 2:

Using Paint Thinner for Interiors and Exteriors

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  1. 1

    Set up your painting supplies in a well-ventilated area. Slide on a respirator or breathing mask before working with any kind of paint thinner. Since these products give off harsh fumes, you don’t want to inhale any paint thinners directly. Additionally, set up a box fan that’s facing away from your painting area, so any fumes can swiftly leave the room.[1]

    • If you’re painting outside, you should still wear a respirator or safety mask.
  2. Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (5)

    2

    Mix a 2:1 ratio of oil paint and turpentine for a thicker paint application. Pour your desired amount of paint into a painting tray. To give your paint a slightly thick consistency, combine 1 cup (240mL) of turpentine or mineral spirits with 2 cups (470mL) of oil-based paint.[2] Use a paint stirrer to mix the ingredients together so the paint has an even consistency.[3]

    • Always use a 2:1 ratio of paint to paint thinner when creating a thicker mixture.
    • These ratios work best for widespread paint application, like the exterior of a home.

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  3. Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (6)

    3

    Stir in more thinner to water down the paint. After pouring your paint into a tray, pour in a larger amount of turpentine or mineral spirits to dilute the mixture. For a thinner paint job, add in 2 cups (470mL) of paint thinner into 1 cup (240mL) of oil paint. Using a paint stirrer, mix these 2 substances together to create a watered-down base for your project.[4]

    • Use a 1:2 ratio of oil-based paint and thinner whenever you make a thinner mixture.
    • Thinner coverage can work well for exterior painting projects that involve a lot of whitewashing.
    • Don’t add too much thinner at once. You can always make adjustments to your mixture later!
  4. Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (7)

    4

    Test out a small amount of paint before covering an entire surface. Before embarking on your project, try combining a small amount of paint and thinner together using your desired ratio. Use a small brush to paint over a tiny spot in your project, so you can see if you like the coverage or not. If the paint job looks good, continue painting over the rest of the surface.[5]

    • Add thinner in small, tablespoon or milliliter increments when making adjustments to your mixture.
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Method 2

Method 2 of 2:

Combining Oil and Mineral Spirits for Art Projects

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  1. Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (9)

    1

    Mix 1 part of linseed oil with 2 parts of mineral spirits in a jar. Pour 1 tablespoon (15mL) or so of linseed oil into a small glass container to serve as the base for your medium. To thin out the oil, add 2 tablespoons (30mL) of mineral spirits into the jar. Use a palette knife or other thin tool to stir these ingredients together. Store the medium in a small glass container.[6]

    • Any drying oil will work for your medium, like walnut oil. Avoid using non-drying oils in your mixture, like coconut oil.
    • If you anticipate needing more oil medium, feel free to increase the amounts in your ratio.

    Did you know? A medium is a substance that lets you apply your paint to a surface in a unique, artistic way.

  2. Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (10)

    2

    Add small, even amounts of oil paint onto your palette. Use a palette knife to scoop a grape-sized amount of different-colored paints onto your palette. Keep these paints at least 1in (2.5cm) apart so the colors don’t bleed together on accident.[7]

    • Always wipe off your palette knife before dipping into a different paint.
  3. Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (11)

    3

    Add 1-2 drops of your medium into each paint color. Take an eyedropper tool and squirt a couple drops of diluted oil into each mound of paint. Ideally, try squeezing the oil into the center of the paint, so it will be easier to mix in. Try adding the same amount of medium to each color, so your paint application looks consistent in your final product.[8]

    • Don’t add too much oil medium at once. You can always add in more thinning agent if the paint is still too thick.
  4. Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (12)

    4

    Stir the ingredients together with a small palette knife. Take a palette knife and spin it through each paint color. Work the tool in round motions, so all the paint mixes in with the drops of oil medium. Continue flipping and rotating the knife until the paint is thoroughly mixed with the oil, and has a consistent texture throughout.[9]

    • Wipe off the palette knife before stirring other paint colors.
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    How do I make oil paint runny?

    Kelly Medford
    Professional Artist

    Kelly Medford is an American painter based in Rome, Italy. She studied classical painting, drawing and printmaking both in the U.S. and in Italy. She works primarily en plein air on the streets of Rome, and also travels for private international collectors on commission. She founded Sketching Rome Tours in 2012 where she teaches sketchbook journaling to visitors of Rome. Kelly is a graduate of the Florence Academy of Art.

    Kelly Medford

    Professional Artist

    Expert Answer

    Mix your oil paint with a little bit of turpentine to make it thinner and easier to use.

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      Things You’ll Need

      Using Paint Thinner for Interiors and Exteriors

      • Respirator or mask
      • Box fan
      • Oil-based paint
      • Turpentine or mineral spirits
      • Paint stirrer or palette knife

      Combining Oil and Mineral Spirits for Art Projects

      • Linseed oil
      • Mineral spirits
      • Small glass jar
      • Eyedropper tool
      • Oil-based paint
      • Palette
      • Palette knife

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      About This Article

      Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (17)

      Co-authored by:

      Kelly Medford

      Professional Artist

      This article was co-authored by Kelly Medford and by wikiHow staff writer, Janice Tieperman. Kelly Medford is an American painter based in Rome, Italy. She studied classical painting, drawing and printmaking both in the U.S. and in Italy. She works primarily en plein air on the streets of Rome, and also travels for private international collectors on commission. She founded Sketching Rome Tours in 2012 where she teaches sketchbook journaling to visitors of Rome. Kelly is a graduate of the Florence Academy of Art. This article has been viewed 73,389 times.

      8 votes - 88%

      Co-authors: 4

      Updated: March 17, 2023

      Views:73,389

      Categories: Oil Painting

      Article SummaryX

      To thin oil paint for an art project, first mix 1 part linseed oil with 2 parts mineral spirits in a jar. Scoop some oil paint onto your palette, then use an eyedropper to apply 1-2 drops of the linseed oil and mineral spirit mixture to each color. Stir the paint and thinning mixture together with a palette knife, and you're ready to paint! To thin oil paint for a home improvement project, mix 2 parts oil paint with 1 part turpentine. Gradually stir in more turpentine until you reach your desired consistency. For more tips, like how to test the consistency of your oil paint before using it, keep reading!

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      Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow (2024)

      FAQs

      Easy Ways to Thin Oil Paint: 8 Steps (with Pictures) - wikiHow? ›

      Thin Oil Paint with Solvents. The most basic way to thin oil paint is by using a solvent such as mineral spirits or turpentine. Solvents will thin the paint very rapidly and thoroughly and are low viscosity, which means they have a more watery consistency.

      How to make oil paint thin? ›

      Thin Oil Paint with Solvents. The most basic way to thin oil paint is by using a solvent such as mineral spirits or turpentine. Solvents will thin the paint very rapidly and thoroughly and are low viscosity, which means they have a more watery consistency.

      What can you mix with oil-based paint to make it thinner? ›

      You can use turpentine, white spirit or paint thinners to thin down oil-based paints for use in a spray gun. The best ratio for oil-based paints is 3/1. That's three parts paint and one part thinners. Oil-based paints vary quite a bit; not all of them can be thinned and used in an air sprayer.

      How do you thin oil-based paint without paint thinner? ›

      Mineral spirits and acetone are acceptable substitutes for paint thinners. However, you should use proper ratios for them to work as paint thinner. For example, experts recommend a ratio of three parts paint to one part solvent. These solvents can emit harsh fumes when used to thin paints.

      How to make homemade paint thinner? ›

      Use a half cup (118 mL) of room temperature water for every gallon (3.78 L) of paint. Pour the paint into the bucket and follow it with the water. Stir the mixture thoroughly with a paint stirrer. Tweak the consistency as necessary by adding small amounts of water.

      What else can you use to thin oil paint? ›

      If you're working on a residential or commercial painting project, mix small amounts of turpentine or mineral spirits with the rest of your paint. If you're an artistic painter, mix linseed oil and mineral spirits together to help apply your paint more smoothly to a canvas.

      Can I use nail polish remover to thin oil paint? ›

      As noted above, mineral spirits and acetone are used to thin different products. Mineral spirits thins oil-based paints while acetone thins lacquers such as nail polish. Additionally, mineral spirits is not water-soluble and presents less of a fire hazard than acetone.

      What is the best thinner for oil-based paint? ›

      As an oil-based paint, it will not mix with water and so needs certain solvents to thin the paint and clean brushes. Distilled Turpentine, derived from pine resin is what should be used to thin your paint.

      Can I use vegetable oil to thin oil paint? ›

      A great question, but the answer is no. You can't use regular cooking oils as a painting medium because it doesn't dry or harden like linseed, walnut and safflower oil. So, if you use regular cooking oils (like vegetable oil, peanut oil and canola oil), your painting will never completely dry.

      Can you use olive oil to thin oil paint? ›

      Non-drying vegetable oils, such as olive oil, should not be used as a substitute for drying oils in oil painting, as they do not dry properly and can cause the paint to crack and yellow over time.

      Can I use rubbing alcohol as paint thinner? ›

      It is often utilized as a thinner for cleaning brushes and other painting tools and effectively dissolves different paint types, including oil-based, latex, and acrylic paints.

      What acts as paint thinner? ›

      Paint thinner is a broad term that actually refers to a range of solvents that are designed to thin paint or remove paint from brushes, rollers, and other painting tools. Common examples of paint thinners include turpentine, acetone, naphtha, toluene, and xylene.

      What can I add to paint to make it thinner? ›

      Paint is divided into two categories: oil-based (or alkyds) or water-based paints. Oil-based paints should be thinned or cleaned up only with petroleum or mineral-based products. In contrast, latex paint is water-based and should be cleaned up and thinned only with water.

      Can you use water as paint thinner for oil paint? ›

      The biggest difference between oil paints and acrylics is that they need to be diluted with solvents. Because oil and water don't mix, after all, adding water to your oils won't make them thinner in the way it does with acrylic paints.

      Can I use water to thin oil paint? ›

      Unlike watercolors, acrylics and other water-based paints, which can be thinned with water, traditional oil paint must be thinned with solvents. The oil molecules in the paint can only be broken down by solvent chemicals; mixing traditional oils with water does not work because water and oil do not mix.

      Can you use alcohol to thin oil paint? ›

      Using 200 proof food grade alcohol as a solvent for thinning oil paints allows you to achieve the perfect consistency without compromising the integrity of your artwork. Unlike denatured alcohol, food grade ethanol is a safer alternative, posing fewer health risks while still delivering exceptional results.

      Can you thin oil paint with cooking oil? ›

      A great question, but the answer is no. You can't use regular cooking oils as a painting medium because it doesn't dry or harden like linseed, walnut and safflower oil. So, if you use regular cooking oils (like vegetable oil, peanut oil and canola oil), your painting will never completely dry.

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