I have to join the skeptics. We have vivid paintings from 17,000 years ago in France, but they are in a cave that was only discovered in the 1940s.

It is hard to believe that paint could last 12,000 years on an exposed cliff face in the jungle. I don't buy it, I doubt paintings could survive 100 years in that environment.

[Linked Image from i.imgur.com]

The paintings in France are much more detailed and artistic than the paintings in Columbia.
The cave at Lascaux France was opened to the public for viewing. After just 23 years, just the presence of humans in the cave was beginning to cause damage to the paintings and the public viewing was shut down.

And these rock paintings, in the steam and heat and rain, the insects and the weeds present in the Columbian jungle, have survived for over 12,000 years?
No way, Jose.