Make sure the battery is out or the crystal is removed. Easy way to lose a hand, cleaning a charged saber!
I don't like armor all, as I find that, unless it it applied regularly (like, weekly) it will dry out and crack plastic and rubber pretty badly.
My experience with it has been on car parts though and perhaps the formula has changed since I abandoned it, years ago.
303 is great stuff, or so I have heard, I haven't even seen it in many years either!
There are lots of cleaners though in your auto parts stores, for chrome, stainless, plastic. Which parts were you having concerns about?