Premise: Boleslav William Felix Robert Sienkiewicz ( ; born May 3, 1958), better known as Bill Sienkiewicz, is an Eisner Award-winning American artist who produces comic book art, primarily for Marvel Comics' "The New Mutants" and "". Sienkiewicz often utilizes oil painting, collage, mimeograph, and other forms generally uncommon in comic books.
Hypothesis: oil paintings are unusual in comic books.