Alexander the coppersmith (Alexandros ho chalkeus). Old word, only here in N.T., for metal-worker (copper, iron, gold, etc.). Possibly the one in 1Ti 1:20, but not the one in Act 19:33. unless he afterwards became a Christian.
Did me much evil (moi kaka enedeixato). Evidently he had some personal dislike towards Paul and possibly also he was a Gnostic.
Will render (apodōsei). Future active of the same verb used in 2Ti 4:8, but with a very different atmosphere.