When designing new stimuli-responsive features in sustainable coatings, the responsive building blocks need to be compatible with green and naturally sourced monomers. One such recently developed sustainable monomer is based on the alkoxybutenolide scaffold, which is derived from biowaste, and can be functionalized through acetal groups. In this work, a straightforward method for postmodification of butenolide copolymers is investigated via acid mediated boc-deprotection. Through post-modification of the deprotected polymers the desired functionalities can be incorporated. Incorporation of responsive units into such polymers will allow for controlling surface structure and properties of the coating.