Once opened, gesso can last for several years if stored properly in a cool, dry place with the lid tightly sealed. However, over time, gesso may thicken or develop a skin on the surface. To extend its shelf life, you can add a small amount of water and mix well to restore its original consistency. It's always a good idea to perform a patch test before using older gesso to ensure it still provides the desired results. **

Once opened, gesso is generally durable for several years if stored properly in a sealed container and kept away from extreme temperatures. However, its durability can vary depending on the quality of the gesso and how it is stored. It is important to check for any signs of deterioration, such as a change in texture or odor, before using gesso that has been opened for an extended period of time. **

Without gesso or a basic primer, the oil paint will not adhere properly to the surface of the canvas. This can result in the paint not spreading evenly, appearing dull, or flaking off over time. Gesso or a basic primer is essential as it creates a smooth and absorbent surface for the oil paint to adhere to, allowing for better color vibrancy and longevity of the artwork. **

Without gesso or a basic primer, the oil paint will not adhere properly to the surface of the canvas. This can result in the paint not spreading evenly, absorbing into the canvas, or flaking off over time. Gesso or a primer is essential for creating a smooth and stable surface for the oil paint to adhere to, ensuring the longevity and quality of the artwork. **

It is recommended to apply gesso as a primer for oil painting before starting a new painting. Typically, one or two coats of gesso are sufficient to create a smooth and stable surface for the oil paint to adhere to. However, the number of coats may vary depending on the absorbency of the surface and the desired texture. It is important to allow each coat to dry completely before applying the next one. **

No, you should not use tinting paint wall paint white lime as gesso. Gesso is specifically formulated to create a smooth, absorbent surface for painting, while tinting paint wall paint white lime is designed for use as a wall paint. Gesso has a different texture and composition that allows it to properly prepare a surface for painting, so it is best to use gesso specifically made for that purpose. Using wall paint as a substitute for gesso may not provide the same quality surface for painting. **

Renewable resources and sustainable resources are related concepts but not exactly the same. Renewable resources are those that can be replenished naturally over time, such as sunlight, wind, and water. Sustainable resources, on the other hand, refer to resources that are managed in a way that meets current needs without compromising the ability of future generations to meet their own needs. While renewable resources are often considered sustainable, not all sustainable resources are necessarily renewable, as some non-renewable resources can be managed in a way that ensures their long-term availability. **

To determine if your gesso is vegan and does not contain any animal ingredients, you can start by checking the product label for any mention of animal-derived ingredients such as gelatin, casein, or bone char. You can also look for certifications such as the Vegan Society logo or other vegan certification labels. Additionally, you can contact the manufacturer directly to inquire about the ingredients and production process to ensure that no animal-derived substances are used in the gesso. **