I have been sewing with metallic thread all week. Like you I had many questions before I started. My LQS suggested I buy and use a product called Sewers Aid by Collins. They said use a jean needle but I used topstitch and slow down. i have not had any trouble at all.
Good luck, I am having a lot of fun with it.
I forgot to add how to use it. just run a fine line down the spool of thread.