Do You Need An Underpainting For Acrylic?

Do You Need An Underpainting For Acrylic? Do you need an underpainting for acrylic? For acrylics, an underpainting is especially useful. Since acrylic paints dry quickly, an underpainting can be developed and layered upon in a short amount of time. Semi-transparent washes can added on top of the underpainting without waiting long periods of time