The ornamental design for a nailpolisher, as shown and described.
FIG. 1 is a front, right side, top perspective view of a nail polisher embodying my new design;
FIG. 2 is a rear, left side, bottom perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is an enlarged top plan view thereof;
FIG. 8 is an enlarged bottom plan view thereof; and,
FIG. 9 is an enlarged view of the selected portion 9 in FIG. 1.
The broken lines shown in the figures depict portions of the nail polisher that form no part of the claimed design. The dash-dot broken lines in the figures are demarcating enlarged areas and form no part of the claimed design.