The ornamental design for a paintbucket, as shown and described.
FIG. 1 is a perspective view of a paint bucket showing our new design.
FIG. 2 is another perspective view thereof.
FIG. 3 is a front view thereof.
FIG. 4 is a left side view thereof.
FIG. 5 is a right side view thereof.
FIG. 6 is a rear view thereof.
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The strap is shown with a break to indicate non-specified length. The appearance of any portion of the article between the break lines forms no part of the claimed design.
The broken line showing is included for the purpose of illustrating and forms no part of the claimed design.