The similarity in fractal dimensions of paint ÒblobsÓ in samples of gestural expressionist art implies that these pigment structures are statistically indistinguishable from one another. This conclusion suggests that such dimensions cannot be used as a ÒÞngerprintÓ for identifying the work of a single artist. To overcome this limitation, the authors have adopted the multifractal spectrum as an alternative tool for artwork analysis. For the pigment blobs, it is demonstrated that this spectrum can be used to isolate a construction paradigm or art style. Additionally, the fractal dimensions of edge structures created by luminance gradients on the canvas are analyzed, yielding a potential method for visual discrimination of fractally similar paintings.