In your opinion, which Latin American city should be crowned the Capital of Graffiti?

I always thought Buenos Aires had a lot of graffiti wherever you go, both in the wealthy and poor neighborhoods, but upon watching many videos of Chilean cities like Santiago and Valparaiso, it definitely felt like it is even more intense on the other side of the Andes. In your opinion, which Latin American city has the most graffiti per capita (this includes both vandalistic and artistic graffiti)?