If it wasn't paint, what is it?
You can "paint" without paint.
Answer the question. What is it?And who can reproduce it?
Anyone could have a go at reproducing it. Those with artistic skills could make a good go of it.
If it's easy, someone would do it.
Maybe they have.
Show me. The burden of proof for this is on you.You know what Jesus looked like? How?
Nope. Given where he was born, he would've been dark skinned, otherwise that would have been another note-worthy miracle. Nobody seems to have mentioned in the bible that Jesus was a whitey.
How do you get Jesus' color from the monochromatic image on the Shroud?