KANSAS CITY, MO.- Its not often that museum visitors actually see a pair of hands working on a work of art, but thats what will be on view at The Nelson-Atkins Museum of Art beginning Feb. 9 through Feb. 25. Louise Nevelsons End of Day Nightscape IV will receive a thorough cleaning, paint consolidation and replacement of lost paint in the gallery in the Bloch Building, and visitors can watch the careful process. This work is always done behind the scenes, said Rose Daly, conservation intern. But the size of this piece necessitated it being done in the gallery. This is an exciting learning experience, since conservation is so seldom seen by the public. End of Day Nightscape IV is a large, rectangular wooden grid of smaller boxes subdivided into compartments containing scraps of wood, geometric shapes, door knobs and paintbrush handles. Spray painted black, it is nearly 8 feet tall