Men don't follow little hints. Mine needs black and white in his face examples - i have to tell my husband that I need to talk to him and then tell him what's on my mind.

It's not the easiest thing to do, and I when he interrupts, I say "Please let me finish"

Try to make it all about how you feel, rather than what he does, because then it feels like an attack.
Example:
Instead of saying "It's very rude and obnoxious of you to interrupt me"
I say
"Please don't interrupt me - it ruins my train of thought and i can't get everything out" I just need to tell you how I feel, and then it will be your turn."

Obviously it's very rude to interrupt but saying it at that moment is not going to help what I'm doing and maybe turn our discussion into a fight, which I don't want.

Make sense?

Good luck!