Darkside: I don't think it could be anything like acid, as the dots are the size of like the end of a pencil. If they applied something to fingers and touched it would be much bigger. They appear to be scar like, but not totally. They don't have the "shiny" appearance most scars do. They are just small bumps, lighter colored than the skin around them.

Titan: yes, us either lol hence throwing this story out there in hopes someone somewhere will recognize something.

It is kinda spooky because it is sorta like he was "marked" or "chosen" for something - yet to be disclosed.