  We highlight general issues associated with quality and naturalness problems
in theories of light QCD-axions, axion-like particles, and relaxions. We show
the presence of Planck-suppressed operators generically lead to scalar coupling
of axions with the Standard model. We present a new class of $\mathbb Z_{N}$
QCD relaxion models that can address both the QCD relaxion CP problem as well
as its quality problem. This new class of models also leads to interesting
experimental signatures, which can be searched for at the precision frontier.
