It depends - coating on a low orbiting satellite needs to conform to various requirements: - needs to survive vacuum - needs to survive atomic oxygen, that do

It depends - coating on a low orbiting satellite needs to conform to various requirements: - needs to survive vacuum - needs to survive atomic oxygen, that does show up at low Earth orbital altitudes - needs to handle the thermal cycling as the satellite goes in and out of Earths shadow - needs to survive unfiltered sunlight without any atmospheric convection to normalize temperature - needs to avoid overheating the part of the satellite it is covering - should not emit particles, that could collide with other satellites - needs to keeps doing this for about 5 years (design lifetime of individual Starlink satellites) - should harmlessly burn up on satellite reantry If the given material can do all the above, while still keeping it's desirable properties, then it can be used on a Starlink satellite. :)