How long does it last? that depends on what it is? some makeup put on before Shabbos with sealants, etc. might last through the night and most of the day. The powedered permissible makeup according to the poskim who mattir them, lasts for much, much less time and requires reapplication,which is probably why they consider it permissible.
Mewho, I wish what you said were the emes! Sadly, many of us need a little (read: a LOT) of help.