We claim the ornamental design for a lawn striping assembly cover, as shown and described.
FIG. 1 is a top perspective view of the lawn striping assembly cover showing our new design;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a side view thereof; and,
FIG. 7 is an opposite side view thereof.
The broken line showing of a tow bar and roller in FIGS. 1–7 is included for the purpose of illustrating environmental structure and forms no part of the claimed design.