I loved the ribcage that Kristen used but I could not size it correctly for my shirt. I also knew I'd only be able to wear it on Halloween. I figured Sugar Skulls are always in season, right? Here is the mask I used as my template. You can see below the parts that I actually cut out (by hand!)
This is where a smart/patient person might cover the entire shirt with paper to avoid spray paint mishaps.
I filled in the rest of the sugar skull by finger painting. This was the best part. I am so in love with it!