FIG. 1 is a top plan view of a paint tray showing my new design;
FIG. 2 is a right side elevation view and the left side elevation view is identical;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front end elevation view and the rear end elevation view is identical thereto; and,
FIG. 5 is a front perspective view thereof.
The ornamental design for a paint tray, as shown and described.