The ornamental design for a weightbenchcover, as shown and described.
FIG. 1 is a perspective view of the weight bench cover showing my new design;
FIG. 2 is a perspective view of the weight bench cover shown in an environment;
FIG. 3 is a front elevation view of the weight bench cover thereof;
FIG. 4 is a rear elevation view of the weight bench cover thereof;
FIG. 5 is a right side elevational view of the weight bench cover thereof;
FIG. 6 is a left side elevational view of the weight bench cover thereof;
FIG. 7 is a top plan view of the weight bench cover thereof; and,
FIG. 8 is a bottom plan view of the weight bench cover.
In the drawings, the dash-dot-dash broken line showing of a weight bench depicts environment and forms no part of the claim; the evenly spaced broken lines represent stitching which does form part of the claimed design.