How To Paint St. John the Baptist in Caravaggio Technique

This was one of the paintings, I could see in the museum before painting.
So I took a lot of photos and tried to use the original colours and tones. Surely I also painted some old, yellowed mastix- or dammarvarnish - but I like this "museumtone"!
The main colours are:
Leadwhite, Ocher, Siena, Umber, Vermillion, Bone Black