Time: 1 hour
Materials: watercolor postcards, masking fluid, eraser, watercolors, brush
1. Using the masking fluid, paint on your desired design. Keep in mind that these areas will remain white.
2. Wait about 10-15 minutes for the masking fluid to dry then apply the watercolors. You can paint right over the masking fluid.
3. Once the watercolors dry, use your rubber cement eraser to lift the dried masking fluid.