Clear gesso or gel medium for making your life drawings paper waterproof?

To paint with oil pastels or watercolor on top of life drawings, you have to make your paper waterproof. You can use clear gesso or gel medium to do so.

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Premium acrylic gesso is used to prepare painting surfaces for acrylic and oil paint Lightweight, non-toxic and dries to a water-resistant,

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Clear gesso or gel medium for making your life drawings paper waterproof?

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