Another interesting artist...

"What happens when an artist who spends all of his life as an outsider is absorbed into the commercial art system?" by Oliver Vasciano

Artur Barrio definitely functioned outside the mainstream art community, but recently his artwork has received attention from museums, etc.  However, he continues to resist his artwork becoming commercial in any way.  He does this through his choice of materials which are often impermanent and decompose very quickly.  Some of his materials of choice are meat, blood, toilet paper, excrement, etc.  The context of his work for the last 40-50 years has been resistance to dictatorial governments.  Now his resistance is to the commodification of art.  He says, "My work has stayed the same, even though the world has changed around it...It is the system that changed, it has accepted the work into its institutions...It's not directly 'political'.  It exists outside that...it is about resistance.  So if it is now about resisting the art market or the artworld, then fine."