Final answer:
It is true that painted surfaces of canvas should not come into direct contact with glass or acrylic to prevent damage and deterioration due to sticking, humidity, and condensation.
Step-by-step explanation:
The assertion that painted surfaces of canvas should never come into direct contact with materials like glass or acrylic (also known as 'acrylite') is True. Placing glass or acrylic directly against the paint can lead to various problems. For instance, the paint may stick to the glass or acrylic, especially in humid conditions, which can damage the artwork when it is moved or removed.
Furthermore, condensation can build up between the glass or acrylic and the painting, which can cause mold growth or other types of deterioration. To protect painted canvases, it is common practice to use a mat, spacers, or a frame design that prevents direct contact with the covering material.