The best thinner for oil-based primer is high-quality mineral spirits (also known as petroleum spirits or paint thinner). For indoor use or areas with limited ventilation, odorless mineral spirits (OMS)—such as Gamblin Gamsol or Sunnyside Pure Odorless Paint Thinner—are excellent choices because they lack the strong, harsh fumes of standard thinners.
Oil-based primer should be thinned using mineral spirits or paint thinner. For specialized needs, such as penetrating bare wood or improving leveling, Penetrol or Naphtha are also highly effective alternatives.
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.
These three golden rules — fat over lean, thick over thin, and slow-drying over fast-drying — work together to help you create vibrant, long-lasting oil paintings.
If the paint does NOT come off, it is oil-based paint and you will need to prime the surface with a bonding primer before applying latex paint. The primer can be latex, but it has to be a product that is made to prepare the surface and help with adhesion and that says “bonding” on the label.
Yes, you can use water-based paint over oil-based primer, but only if the surface is sanded, cleaned, and fully cured. Skipping prep leads to peeling, bubbling, or adhesion failure. With the right steps, you can combine both for a durable, long-lasting finish.
Primer, often referred to as gesso, is applied to a dried sized canvas to create an even surface before painting. Applying several layers will result in a smoother finish, and many artists choose to lightly sand the dry gesso between coats for added refinement, allowing at least an hour between each layer.
You should avoid skin contact when dealing with oil painting products. Solvents are easily absorbed by your skin so every time you touch some of it, you should immediately wash your hands.
In art, the 80/20 rule (the Pareto Principle) means that 20% of your effort or core variables yield 80% of the final impact. In practice, painters use it to focus heavily on foundational elements rather than wasting time on minor details that the viewer's eye rarely registers.
Firstly, when painting with oils, it is important to adhere to the three rules of oil painting. These are 'fat over lean', 'thick over thin' and 'slow-drying over fast-drying'. This means that each layer of paint should be progressively more flexible, thicker and slow drying than the one below it.
When you drag your brush across oil-based primer that is drying, the brush will leave marks and rough up your smooth surface. The only fix will be to wait until it is completely dry and then use a sanding sponge aggressively to make the surface smooth again.
Red is universally considered the hardest paint color to cover. Vibrant red pigments are highly transparent and inherently prone to bleeding through subsequent layers. Other notoriously difficult colors to cover include black, dark blue, dark green, and bright yellow.
Oil-based primers can be more toxic than standard paints because they often contain higher concentrations of solvents and release stronger fumes. This means they may produce more intense odors and increase exposure risks, especially in enclosed spaces without proper ventilation or protective measures in place.
However, the only disadvantage is that they require a solvent and not water. Mineral spirits and paint thinner are the principal solvents used to thin oil paint.
Bob Ross primes his canvases using Liquid White, Liquid Black, or Liquid Clear as the foundational base for his famous wet-on-wet technique. These specially formulated liquid oil paints are applied in a very thin layer across a pre-gessoed canvas. This creates a slick, wet surface that allows thicker oil paints to easily glide, slide, and blend together.
To dilute lyophilized (powdered) primers for PCR, first make a 100 𝜇M master stock by adding molecular-grade water or TE buffer equal to 10 times the number of nanomoles (nmol) in the tube. Then, dilute this stock to a 10 𝜇M working concentration (e.g., 10 𝜇L of stock + 90 𝜇L of water).
Applying Paint Too Thickly, Too Soon
The technique of 'fat over lean' suggests starting with thinner layers of oil, which will ensure that you can build up your paint gradually over time and allow your oil paint to dry appropriately.
The three foundational rules of oil painting are: fat over lean, thick over thin, and slow-drying over fast-drying. These principles ensure that each new layer is more flexible and dries slower than the layer beneath it, preventing your painting from cracking as it ages.
Before the use of oil paint, artists used tempera paint. Unlike oil paint, tempera paint was made by mixing pigment with egg yolks. The resulting mixture dried fast and made it hard to get fine details. The colors were often dull and faded.
The golden ratio (also known as the golden section, and golden mean) is the ratio 1:0.62. Use it to divide lines and rectangles in an aesthetically pleasing way. In the above square A is 0.62 of the rectangle. Square B is 0.62 of square A.
It depends on a few factors - height of the walls, number of doors/windows, and whether it's brush & roll or spraying. But generally, for standard 8-10 ft walls, rolling alone, you're looking at 800-1,200 sq ft per painter per day. If spraying, it can be much higher.
The most famous figure rejected from art school is Adolf Hitler.
Because art is subjective, there is no single "saddest" painting, but a few universally recognized masterpieces frequently evoke profound sorrow.
Key Points
Here are the top 5 regrets homeowners have after painting and how we make sure you avoid them.