A foam applicator for spraying foam cleaning solution capable of appearing luminescent. The applicator may have an interior chamber for receiving pressurized foam, orifices for discharging foam, and a light source. The body may have an integral compartment for housing and keeping the light source dry. The applicator body may be translucent so that light from the light source gets transmitted and scattered throughout the body, giving the body luminescence. The body may be transparent. The applicator has applications in car washes, hand-held cleaning devices and other cleaning devices.

Systems described herein relate to reclaiming and reusing delivery control liquid (DCL) from a paint cartridge. In one embodiment, a system includes a cartridge mount to receive a paint cartridge that has a paint bag surrounded by a DCL region. The system also includes a mounting plate coupled to the cartridge mount. The mounting plate includes 1) an air inlet port to open an inlet check valve of the cartridge and introduce air into the DCL region and 2) an outlet port to open an outlet check valve of the cartridge and evacuate the DCL region. The system also includes a piston to depress the cartridge onto the mounting plate to open the inlet check valve and the outlet check valve.