Final answer:
Varnish is suitable for acrylic paintings but not for pastel artworks due to their unique characteristics.
Explanation:
Varnish is a method used to preserve an artwork created with acrylic paint, as it seals and protects the paint layers. However, this method should not be used with an artwork created with pastels, as it can alter the delicate texture and appearance of pastel work.
Unlike acrylic paint, pastels are usually fixed with a spray-on acrylic to hold the pigment in place. This process helps secure the delicate pastel pigments without compromising their appearance.
Therefore, while varnishing is appropriate for acrylic paintings to protect and enhance them, it is not suitable for pastel artworks due to the unique characteristics and fixative used in pastel work.
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