Patti Hansen proved that she was still supermodel material in a rare appearance for the wife of Rolling Stones rocker Keith Richards. The 69-year-old, who rarely updates her social media, showcased her athletic figure in a photo posted to Instagram, as she wore a patterned sun-safe outfit.  Patti stood by the beach with her hands on her hips as she modeled the blue, black and white long-sleeved shirt and matching pants. The high neckline protected her from the sun’s rays, while her toned stomach peeked out from below the shirt.  Patti’s fans rushed to the comment section to share the love, with one writing: “Always so beautiful and elegant!” while another added: “Patti you look great!”  “You look gorgeous as always Patti!” said a third, while another chimed in: “Just stunning.” The mother of two was first scouted as a model in the ’70s at just 14 years old, and was signed to a modeling agency two years later.  From there, she enjoyed an incredibly successful career and appeared on the covers of Harper’s Bazaar, …