Why is watercolor considered hard to learn?
Watercolor painting has always been so popular, but it does not mean that it is the easiest medium to deal with. Painting with watercolors can be difficult because it is somewhat unpredictable. Additionally, your mistakes will be harder to fix, as the fluid nature of watercolors makes it hard to control.
How do you keep watercolor paintings from fading?
Sunlight plays a major role in fading or discoloring watercolors. You can avoid that by covering your painting with a sheet of filtered glass or acrylic. And naturally, any contact with water or moisture will cause your paints to smear or run. In this case, you can also use a varnish for sealing the painting from any environmental elements.