Fashion Designers Customize Two Infiniti Q50s To stand out from the cars that share its nameplate, a special edition car really has to shine. In the case of the Infiniti Q50 customized by Thom Browne, the fashion designer, the car's shininess is literal as well as figurative. Like the Fisker Karma Justin Bieber once owned, the Q50 is covered end to end in chrome. Infiniti on Tuesday presented two fashion designer-customized Q50s - the other one was done by Zac Posen - at an event at Infiniti of Manhattan, the dealership on 11th Avenue. But while Mr. Browne's reimagination of the Q50 gleamed, Mr. Posen's tended toward an almost baroque level of intricacy seldom seen since the denouement of the 1970s. Mr. Browne - wearing his trademark wingtips, along with shorts and a gray jacket and tie at the presentation, contrasted with the all-chrome, mirrorlike Infiniti he had designed for the company as a kind of postscript to Fashion Week in New York and the Frankfurt Motor Show. Last year, he said, he ordered several pairs of wingtips painted silver for the models in one of his menswear shows. "It was a joke about mothers and baby shoes," he said, recounting the custom of mothers dipping their children's first pairs of shoes in silver or bronze to preserve them. Mr. Browne decided to apply the concept to the Q50 as well. "They asked us to reflect their customers," he said, explaining that the effect was achieved with a chrome appliqué film. Even the windows appear mirrored. Is it street legal? "Almost," said Mr. Browne, who acknowledged that the film covering the windows would have to be lightened to comply with the state's motor vehicle code. Inside the car are gleaming silver accessories, like the shifter, and Mr. Browne's trademark red, white and blue ribbon (not to be confused with Ralph Lauren patriotic or Tommy Hilfiger's red, white and blue patterns) snakes across the upholstery and even around the edges of the door frames. The tricolor ribbon is also applied to a matched set of old-style luggage designed to fit in the trunk. Mr. Browne designed an equally reflective business card case to go with the car. Mr. Posen said that when he was briefed by Infiniti's new design director, Alfonso Albaisa, about applying his fashion ministrations to a Q50, Mr. Posen was impressed with the designers" pride in the flow of the body forms. "They explained that they were influenced by Japanese pen drawings and samurai armor," he said. His prescription for the car was a sophisticated paint job, which shifted in multiple ways from front to rear. "I wanted to get the effect of lacquer," he said. The paint changes from matte to glossy, from the front of the car toward its rear, and from silver to a darker gray, in what the designer calls a shadow effect. "It also seems to move, he said, adding, "It took 32 coats." Plush carpet lines the interior - "I'm known as the glamor guy, so I have red carpet," he said. The door and dash accents are made from shagreen - which turns out to be a fancy word for stingray skin - inspired by the car's transmogrifying body colors and textures. The shagreen is rough to the touch. Did you know they use this in Japanese restaurants to grate the wasabi? Mr. Posen asked. He also designed a mobile phone case of matching red leather. Both cars will travel to five cities as part of a joint marketing program Infiniti has embarked upon with Gilt.com, an online fashion retailer. The Q50s will be shown along with luxury goods in pop-up stores or "concept rooms" also dreamed up by the two designers. Mr. Browne showed sketches of his room: it featured chrome pillars. At the end of the tour, on Dec. 12, the cars will be sold on Gilt.com for $75,000 each, with a portion of the proceeds benefiting St. Jude Children's Research Hospital. Buyers will each receive $10,000 of credit on Gilt.com, as well as a style consultation. The designers will also sell editions of items matching the cars on Gilt.com. Mr. Browne's solid silver personal card case with signature red, white and blue stripe will be sold in a run of 100 for $650 each; 350 of Zac Posen's red leather smartphone clutches will be produced and sold for $250 each.