E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Man of Wax.
A model man; like one fashioned in wax. Horace speaks of the waxen arms of Telephus, meaning model arms, or of perfect shape and colour; and the nurse says of Romeo, Why, hes a man of wax (i. 3), which she explains by saying, Nay, hes a flower, i faith a very flower.