Mobile painting systems are generally described. In some examples, a mobile painting system may include a vehicle with a wireless receiver, a first motor configured to drive at least one wheel of the vehicle, a first power supply configured to supply power to the first motor, and a recessed portion sized and shaped so as to receive a paint tray. The mobile painting system may include a painting device including a wireless transmitter, a first selectable control, and a second power supply. The first selectable control may transmit control signals effective to control operation of the first motor when received by the wireless receiver of the vehicle.

A receptacle for a paint roller includes: a tray having a base, an open top, two opposed side walls, a front wall, and a rear wall defining a cavity configured to receive the paint roller, wherein at least one groove is formed in at least one of the two opposed side walls, the groove configured to receive a portion of a handle of the paint roller; and a coupler extending from the front wall, the coupler having a channel configured to removably couple to a rim of a paint container, the channel having a length that is less than half of a length of the front wall.

The moveable paint tray preferably includes a base ring, a peripheral wall, a sloped ramp, an engagement platform, a handle and a hood. The peripheral wall extends upward from an outer perimeter of the base ring. A liquid support surface is formed in a portion of an inner perimeter of the base ring. The sloped ramp extends upward from an end of the liquid support surface. The engagement platform extends from an end of the sloped ramp. A ramp wall extends inward and upward from an inner perimeter of the base ring to the sloped ramp and the engagement platform. The handle extends from an outer perimeter of the peripheral wall, adjacent the engagement platform. A drain spout is formed through the peripheral wall on an end opposite the handle. A second embodiment of the moveable paint tray does not include a hood for nesting multiple units together.

A receptacle for a paint roller includes: a tray having a base, an open top, two opposed side walls, a front wall, and a rear wall defining a cavity configured to receive the paint roller, wherein at least one groove is formed in at least one of the two opposed side walls, the groove configured to receive a portion of a handle of the paint roller; and a coupler extending from the front wall, the coupler having a channel configured to removably couple to a rim of a paint container, the channel having a length that is less than half of a length of the front wall.

A joint compound application assembly for evenly applying joint compound to drywall includes a cart and a box disposed on the cart. A pan is positionable in the box thereby facilitating the box to restrain the pan and the pan can contain joint compound. A roller mount has a first engagement element fixed to the roller mount and a second engagement element movably attached to the roller mount. The second engagement element is positionable in an engaging position or a disengaging position. A pair of rollers is provided and a respective one of the pair of rollers is rotatably attachable to the first engagement element and the second engagement element. In this way the respective roller can apply the joint compound to a wall.