Nissan doesn't recommend aftermarket chroming of their OEM wheels. Here is the TSB on it.
Nissan Original Equipment or Genuine Accessory Alloy wheels, along with their finish coating (clear, chrome, titanium, etc.), are specifically developed to achieve Nissan design and performance standards. These Original Equipment or Genuine Accessory wheels are subjected to testing to ensure they meet Nissan's standards. Nissan Original Equipment Alloy or Genuine Accessory wheels subjected to aftermarket chroming may no longer continue to meet these standards and may be seriously damaged. Therefore, Nissan most strongly discourages, and recommends that these wheels NEVER be subjected to, aftermarket chroming. See this bulletinfor further detail.