  The chirally rotated Schr\"odinger functional for Wilson-fermions allows for
finite-volume, mass-independent renormalization schemes compatible with
automatic O($a$) improvement. So far, in QCD, the set-up has only been studied
in the quenched approximation. Here we present first results for $N_{\rm f} =
2$ dynamical quark-flavours for several renormalization factors of
quark-bilinears. We discuss how these renormalization factors can be easily
obtained from simple ratios of two-point functions, and show how automatic
O($a$) improvement is at work. As a by-product of this investigation the
renormalization of the non-singlet axial current, $Z_A$, is determined very
precisely.
