  H-deficient post-AGB objects, e.g. PG1159 type star K1-16 and born-again AGB
star Sakurai's object, have been reported to be significantly iron-deficient.
We find that the iron deficiencies expected due to neutron-capture
nucleosynthesis during either the progenitor AGB evolution and/or the neutron
burst that occurs as a result of the rapid burning of protons during a post-AGB
He-flash are generally in line with observations.
