I actually saw this piece of "street art" being painted, and thought it was a fantastic idea, but had no idea who was responsible. After finding quite a few more I reckoned they needed a wider (geo-caching) audience.
The broadband cabinets that have sprung up around the country have proven highly susceptible to graffiti, and are often re-targeted soon after the graffiti is cleaned off. The broadband company in conjunction with local councils, runs a programme of beautifying these boxes, with the hope this will discourage graffiti, and giving the local community a piece of artwork they can enjoy. Many of these cabinets in Hutt City are receiving brightly coloured artworks carried out by local artisits. Each cabinet is painted in a different theme, often in consultation with the local residents. The company prioritise those cabinets that are most frequently hit with graffiti.
I considered adding a photo to the cache description, but thought it better to let cache-finders experience the art as they come upon it. {I may add a photo at a later date}.
The artists for this particular work are Kane "Scream" Smith (a former graffiti artist) and Emily Roberts. This particular piece is not as bright as others, and camouflages well with surroundings. It would be very easy to miss it altogether, especially speeding by at 100km/hr. The painting itself is done with aerosols and test pots, and then coated with a hard-wearing anti-graffiti sealant.
The cache itself is 'hidden' in plain sight. It's a bit of a trial to see how long it lasts, away from the eyes of the neighbours, and hopefully where there is a low volume of foot traffic.
Please replace exactly as you found it, and preferably nice & CENTRALLY. Use stealth and any required covertness/deception to avoid bringing this cache to the attention of muggles. A writing implement will also be necessary!