I'm trying to figure out if the blue scroll is hand painted??  If so with what medium?

If anyone knows please let me know!  Thank you.

It looks hand painted to me too. I use vodka as a medium when I hand paint food coloring. It helps stick the food coloring to the fondant a lot better than water. When it dries, the alcohol will evaporate. I personally like to use berry flavor vodka. 

edible ink marker?

Looks to me like a stencil was used with an edible marker.

the blue design whether painted or stenciled is A...W...E...S...O...M...E...

I'd have a heart attack if I tried something that unforgiving on someone's important cake.

Yeah, hard to tell.  It is beautiful.

Looks hand-painted to me.  By someone obviously talented, and experienced.