The circular economy is a new and inclusive economic paradigm that aims to minimise pollution and waste, extend product lifecycles, and enable broad sharing of physical and natural assets [1]. Many of the UN's Sustainable Development Goals can be only achieved through circular economy [2]. As recycling of applied coatings is hardly practical, the biological carbon cycle offers the best option for the circularity of the main organic component of coatings - their binders. The pre-condition is bio-based binders. Bio-based polymers are nothing new. The practical issues with them lie in their limited performance and availability, both quantity ...