Using the Rude Sun eyeshadow palette is easy. For the regular matte and glimmer hues, just use your favorite eyeshadow brush to apply them on your eyelids. When it comes to the water - activated neon shades, first wet a liner brush and then dip it into the shade. You can create bold and bright liner looks with them. Before using the palette for the first time, do a patch test on a small area of your skin. Wait for a while to see if there's any redness or itching. If you experience these symptoms, don't use the product. To keep your palette in good condition, store it in a cool and dry place. Avoid exposing it to direct sunlight or high humidity. Also, make sure your brushes are clean when using them with the palette to prevent contamination.