Water-Soluble Oil Paint

Can you varnish the water mixable oil painting?

Water-mixable oil paintings can be varnished much like traditional oil paintings once the paint film is sufficiently dry for the specific varnish and application method.

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In this article, I will explain:

What are the good varnishes for water mixable oil painting?

Use varnish intended for oil paintings and compatible with water-mixable oils, choosing gloss, satin, or matte according to the desired surface and manufacturer guidance.

The varnishes will fit with your water mixable oil painting.

Varnish typeGradeNote
Winsor & Newton Artists' Retouching VarnishTemporary & retouchingArtistic Removable varnish, built for temporary protection 
Winsor & Newton Artisan Matt VarnishFinal varnish & mattArtistic Long time protection
Winsor & Newton Artisan Gloss VarnishFinal varnish & glossArtistic Long time protection
Winsor & Newton Artisan Satin VarnishFinal varnish & stainArtistic Long time protection
Winsor & Newton Artists' Aerosols Artists' Picture Varnish, GlossPermanent and final Artistic Good alternative. Spray varnish, it can not be removed. Final and parmatent apply.

I already explain similar topics in different articles, you can check

When should you varnish the water mixable oil painting?

Final varnish timing depends on paint thickness, medium, climate, and varnish type, so judge dryness and follow the varnish manufacturer's instructions rather than a fixed calendar.

  1. Touch test
  2. Scratch test
  3. Cut test
  4. Solvent test
  5. Visual inspection test

Which I already explained in the article.

So applying the final varnish takes a long time. Within this time, you should apply temporary varnish to protect your painting.

How to apply temporary varnish?

Retouch varnish can sometimes provide temporary surface protection before final varnishing, but only when the product is intended for that use and the paint is dry enough.

To apply the temporary varnish, you need

  1. Dry clothes or paper towel 
  2. Brush 2-4 inches brush
  3. Retouch varnish

How to apply the varnish

Step 1: Preparation

Take the dry cloth or paper towel, then clean the dust gently from the painting. Next, you can blow the painting with a hair dryer in a cold setting. It will remove existing dust from the painting.

Step 2: Apply varnish

Varnish can need to be diluted with solvent. Some varnishes do not need thinning. Read the manufacturer's label and guidelines properly. If varnish needs, you can apply Gamsol ⅕ ratio to thin the varnish.

Varnish each layer should not be thick. There is a chance of tracking. 

So take a 2-4 inches paint brush and spread the varnish all over the painting. 

Step 3: dry and finishing

Give it 12 hours to dry, and you can apply a second coat if you want.  

What happens if you final varnish on water mixable oil painting too early?

Applying final varnish too early can interfere with a still-curing oil-paint film and may lead to adhesion, appearance, or drying problems beneath the protective layer.

So you have to be patient with the dry time of oil painting. Or it would be best if you chose acrylic or watercolor, which dry quite fast, like 12 hours. 

There already have a great experiment on this topic. This is the video…

https://www.youtube.com/watch?v=LZ6YoZKLiwE

After two years

https://www.youtube.com/watch?v=2RgusYINsQ4

How do you final varnish on a water mixable oil painting?

Once the painting is sufficiently dry, remove dust, choose a compatible varnish, and apply it evenly according to the product's brush or spray instructions.

You need

  1. 2-4 inches brush
  2. A dry cloth or paper towel
  3. Varnish

How to apply?

You can apply the varnish following the same method as you applied retouching varnish.

Step 1: Preparation of the painting

Take the dry cloth or paper towel, then clean long time dust gently from the painting. Next, you can blow the painting with a hair dryer in a cold setting. It will remove existing dust from the painting.

Step 2: Apply varnish

Varnish can need to be diluted with solvent. So how much solvent or thinner is best for diluting read the manufacturer's label and guidelines. You can apply Gamsol ⅕ ratio to thin the varnish if thinner needs.

Varnish each layer should not be thick. There is a chance of tracking. 

So take a 2-4 inches paint brush and spread the varnish all over the painting. 

Step 3: dry and finishing

Give it 12 hours to dry, and then apply a second coat. If you think more coats are needed, follow the step.

Can I use spray varnish on water mixable oil painting?

Spray varnish can be used on sufficiently dry water-mixable oil paintings when the product is compatible and applied with proper ventilation, distance, and coat control.

  1. Beginners can accidentally apply thick layers, which causes cracking.
  2. Most of the spray varnish are permanent and not removable. However, it is true that painters usually do not want to remove varnish. And they like that the protective coating should be permanent. 

Without this, they are easy to apply, need less time, easy to master, and have other advantages. 

How do spray varnish on water mixable oil painting?

Apply spray varnish in light even passes at the recommended distance, keep the painting dust-free, allow each coat to settle, and follow the product's drying guidance.

  1. Dry cloth/paper towel 
  2. Safety gear: mask, gloves
  3. Spray varnish

How to apply?

Step 1: Preparation

Take the dry cloth or paper towel, then clean long time dust gently from the painting. Next, you can blow the painting with a hair dryer in a cold setting. It will remove existing dust from the painting. Wear protective gear.

Step 2: Apply

Go outside or ensure proper ventilation. Shake the varnish cans. Start to spray varnish 8-16 inches away from the top-left corner outside the canvas, then end spray the top-right corner outside the corner. 

Start spray of the outside because the sprayer will spray a lot of liquid at the start time. So the painting will be wet, and it will damage the painting. 

Start from the top left corner and end at the top right corner. Repeat the process with as zigzag motion.

After spraying all the painting, the canvas rotates 90 degrees, and applies the same spray method again. 

Step 3: Dry and finishing

Give it 1-2 hours to dry. Then apply the 2nd coat.

This tutorial video will help you!

https://www.youtube.com/watch?v=oftc1p5KcY4