MILK ROSE CNI Poly Gels Nail Up. The second step in the NailUp system. Polygel Milk Rose has a milky pink shade with a high density in color. It is a hybrid material that incorporates the best properties of gel and acrylic. The polygel keeps its shape and does not polymerize without UV light, so you can work with this material for a long time, bringing the shape of the nail to the ideal leveling, and this will significantly reduce the filing time. Fileing a polygel is as easy as filing a gel. It is not too hard and can be easily removed with nail files or cutters for manicure.