The invention relates to a method for forming a film which may be used as a mascara, an eye-liner, a nail varnish or a lacquer, by applying to eyelashes, hair, nails, or skin a film-forming composition in an aqueous medium, containing, in dispersed form, at least one film-forming material and a fluoro copolymer resulting from the copolymerization of at least a first fluorovinyl monomer and at least a second monomer of formula (A): ##STR1## where R.sub.1 represents a hydrogen atom or a C.sub.1 to C.sub.4 alkyl radical and R.sub.2 represents a C.sub.1 to C.sub.6 alkyl radical, a C.sub.2 to C.sub.4 hydroxycarbon radical or a radical --(CH.sub.2).sub.p --NH--R.sub.3, where R.sub.3 represents a C.sub.1 to C.sub.6 alkyl or a cycloalkyl and p is an integer ranging from 1 to 4, for a time sufficient to form the film.