Arghhh! I've scratched my Nikon D4 sensor

I agree with others: it might NOT be a scratch. I once had to change cleaning fluids (but do not remember wich) in order to remove bad streaks that would not dissolve using one of the Eclipse solutions . And some time later, found out some type of smears did require more pressure and rubbing (I know it sounds awfull).
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Jean Bernier

All photographs are only more or less credible illusions