How to paint your own decorative plates: decorate your plates with sharpees, bake them at 350 degrees for about 30 minutes. Let your plate cool down completely. Spray a clearprotective coat on dishware. This allows you to use it for serving food. You can purchase a Krylon acrylic crystal clear coating 11 oz bottle. This spray protects your drawings and decoration from water, dust and stains. It provides a permanent gloss coating to your plate.