"New images from the 2012 excavation of Easter Island’s iconic statues reveal the renowned heads are not only connected to giant bodies, but the bodies are covered in mysterious designs and symbols [petroglyphs], which researchers have likened to tattoos." Source: Ancient Origins (2018).
Note: This is fairly old news. The statue's buried bodies were being excavated back in 2010 and the petroglyphs were clearly visible then, according to this 2012 Live Science story. The petroglyphs can be seen in a photo accompanying the story and in the video report above.
Rock art has been discovered all over Easter Island and something like 300 sites were known back in the 1980s, according to the Easter Island Statue Project (EISP). Whatever the case, it wouldn't be surprising if the designs on the enigmatic statues were intended to represent tattoos. "Tattoo (tatau) is an ancient Polynesian and Micronesian practice that is a deeply traditional part of social, economic, and aesthetic life," according to the EISP.