There are a few schools of thought on this subject. Some artists believe that glass protects the painting and helps to keep it from getting damaged, while others believe that it can actually cause problems. Here are a few things to consider:
1. Glass can protect your painting from UV light, which can fade the colors over time.
2. Glass can also help to keep dust and dirt off of your painting, which can damage the surface over time.
3. However, glass can also cause condensation to form on the surface of your painting, which can lead to mold or mildew growth. It's important to make sure that your painting is completely dry before you frame it with glass.
4. If you do choose to frame your painting with glass, be sure to use non-glare glass so that viewers will be able to see the artwork clearly without any reflections obscuring their view.