Colored stock comes in an astonishing array of colors, so I would leave the general color scheme up to the client. A matched set of the 13 Archimedean polyhedra might use the same color for the same kind of face throughout the set, so that all triangles are blue, all squares green, all pentagons red, and so forth. The smaller one I recently custom built for a client in Reno, Nevada, whose home it now helps to decorate, and I have another one on order. It seems to be a particular favorite. A simple model, such as any one of the Platonic solids, may take only a half-hour to assemble.
More complicated models can take several days to several weeks.
Unfortunately, the model itself no longer exists. If the models are to be painted, the price might have to go up by as much as a factor of two because of the extra construction time. Matched sets, such as the Archimedean solids with a uniform edge-length or with equal circumradii, or aggregates built from the same templates, qualify for quantity discounts that can be worked out in individual cases. I would be interested in contracting with a well-endowed institutional mathematics department to produce a complete matched set of all 76 nonprismatic uniform polyhedra, convex and nonconvex, for permanent public display. All models and matched sets will be accompanied by an autographed short leaflet or pamphlet describing their characteristics and explaining their geometric significance.