TINTZ Tasman is a window tinting service at 76d Vanguard St in Maitai, Nelson, with a Google rating of 4.5.
Window tinting reduces heat, glare and UV, and adds privacy, but the rules and the quality of the film both matter. In New Zealand, the front windscreen and front side windows must stay light enough to meet visibility requirements, so a tinter should tell you what is legal for each window before you choose a shade. Ask what film is used and whether it is dyed, carbon or ceramic, since ceramic films tend to block more heat without going very dark, and ask about the warranty against bubbling, peeling and fading. A clean, dust-free bay makes a difference to the finish. After tinting, leave the windows up for a few days while the film cures, and expect a hazy look at first. Regulars use a soft cloth and ammonia-free cleaner, and avoid scraping the film.
For drivers around Nelson, TINTZ Tasman on Vanguard St is a local place to ask about tinting.