Someone on EventHubs pointed out the fact, so I did some digging on the subject. It's weird, I always thought that was red paint when I was a kid (much like Alex's eye paint).
And isn't Sean 16 in this game & 19 in Third Strike? That's where I gathered the 3-year gap from. Not sure about Second Impact, but you're probably right about the 2-year gap between SFV & Second Impact.
Yeah I thought it was paint as well.
I have no idea how old Sean is, tbh. I gathered he was in his mid to late teens but I don't remember an age being specified.