I remember a movie from the 80’s where a group of guys went to either South or central America looking for some lost plane cargo/treasure. One of the guys helping them was a political refugee of some sort who mainly went back to see an old girlfriend. There was a scene of the political refugee getting clean and ready in the jungle in front of the other guys. I think they found the cargo/treasure in an old military base or satellite facility. I had thought the refugee was played by Raul Julia but I checked his filmography, its not him.