REMAP is an R&I four years project funded by the European Commission under the PathFinder Open programme (grant agreement No. 101046909). REMAP's long-term ambition is a paradigm shift in microfabrication. REMAP envisions a radically new and green surface patterning technique based on the spontaneous formation of reusable magnetic masks. Such masks are possible using fully adjustable and reversible interactions of "magnetorheological electrolytes" (MRE) on a substrate and microstructured magnetic fields generated by a permanent array of electromagnets below the substrate. By selectively activating each micro-electromagnet, it is possible to modulate the intensity and shape of the magnetic field (hence the mask) over space and time. This way, REMAP enables high-throughput area-selective additive and subtractive patterning on a surface at room temperature and pressure. Furthermore, the newly devised MREs and the tunable magnetic array developed within REMAP will pave the way to a lab-on-plethora of future applications from lab-on-a-chip biomedicine, NMR analysis and smart fluids for robotic space exploration. The consortium includes two Universities (Genova (IT) and Luxembourg (LU)), three Research Centers (Iberian Nanotechology Lab (PT), CNRS-Nice (FR) and NCSRD (GR)) and two companies (SOLVIONIC (FR) and RINA (IT)).