Primarily a painter, Feeley favored canvases in which simple geometric forms are deployed singly or in repeating groups. He used upright barbell or baluster shapes, oblongs that resemble peanuts, small solid-looking arches and wavy-countered squares and rectangles. Fascinated with modularity, Feeley often surrounded his forms with white bands and colored borders that echo the contours of the central shape. While the paint handling in his work is always restrained and stencils were used to repeat forms, Feeley is not a "hard edge" painter; his geometry is too clearly of the handmade variety. The solid colors (predominantly red, blue, green, orange) are usually limited to two colors on a white ground, although the watercolors often use more hues per composition than the paintings.

Rubinstein, Raphael (1998). "Paul Feeley at Lawrence Markey". Art in America. 86 (4): 114–115.