The ornamental design for a palmbrush, as shown and described.
FIG. 1 is a top, front perspective view of a palm brush according to the present disclosure;
FIG. 2 is a first side view of the palm brush of FIG. 1;
FIG. 3 is a front view of the palm brush of FIG. 1;
FIG. 4 is a second, opposite side view of the palm brush of FIG. 1;
FIG. 5 is a back view of the palm brush of FIG. 1;
FIG. 6 is a bottom view of the palm brush of FIG. 1; and,
FIG. 7 is a top view of the palm brush of FIG. 1.
The broken lines in the drawings illustrating environmental structure or boundaries that form no part of the claimed design. The stippled shading shown in the drawings represents the three-dimensional contour of the design and is not intended to indicate surface ornamentation.