We claim the ornamental design for a finishing knife, as shown and described.
FIG. 1 is a front perspective view of a finishing knife in accordance with an embodiment of the present invention.
FIG. 2 is a rear perspective view of the finishing knife of FIG. 1.
FIG. 3 is a left side view of the finishing knife of FIG. 1.
FIG. 4 is a right side view of the finishing knife of FIG. 1.
FIG. 5 is a front view of the finishing knife of FIG. 1.
FIG. 6 is a rear view of the finishing knife of FIG. 1.
FIG. 7 is a top view of the finishing knife of FIG. 1; and,
FIG. 8 is a bottom view of the finishing knife of FIG. 1.
The portions of the finishing knife shown in broken lines are included for the purpose of illustrating environment and form no part of the claimed design. The portions of the finishing knife shown in broken lines having unequal length segments illustrate the boundary of the claimed design and form no part of the claimed design.