Better known for his tough guy roles in the ‘Rocky’ and ‘Rambo’ films, Sylvester Stallone was in southern France this weekend for the opening of a retrospective of his artwork. The 68-year old US actor signed autographs for fans on Saturday at the modern art museum in Nice, where his ‘Real Love’ exposition is running for two weeks. ‘Painting, without a doubt, is the most honest form of all the arts. Because it’s simple, unforgiving, and it’s there to be studied up-close and personal. And you can’t defend it, it’s there. So I think it’s the most honest of all the arts,’ Stallone, sitting alongside Nice Mayor Christian Estrosi, told a press conference. Stallone, an Academy-award nominated actor as well as a director and screenwriter, studied art before his film career took off, and has also had shows in Russia, Switzerland and Miami. Estrosi praised Stallone’s work on Twitter. ‘The exposition