Decorating an acoustic guitar is not completely unprecedented.

During WWII woody Guthrie put a sign on his guitar which said, "This machine kills Fascists!"

Pete Seeger wrote the words "This machine surrounds hate and forces it to surrender" on his banjo head.

If I'm not mistaken Art Thieme wrote "This machine kills roaches" on HIS banjo head.

What needs to be done is to bring the idea full circle by putting a sign on an acoustic guitar which says, "This machine kills germs that cause bad breath".