haha those are so cute! where did you get the second stencil? as for covering the stains, how about some little painted flames?
I got the idea for the marshmallow shirt from http://www.barrysfarm.com/men/shirt/marshmallow.html
I just printed out the picture from that website and cut it out without bothering to make a real stencil. For the eyes and the mouth, I cut out seperate pieces and stuck them on with the spray adhesive. Thanks for the flame idea