Can you crack the code below? It was intercepted from a suspect's notebook.
KHOOR FODVVLF GHWHFWLYH
Hint: Try a Caesar cipher with a backward shift of 3.
I mix metals but am not a smith,
I make them stronger, that is my gift.
I’m made of parts, yet one I seem—
What am I?
Answer: It's a 5-letter word and this month's secret password for the club newsletter.