Patrick,
Honestly, cleaning rusted track is not worth the trouble nor time wasted. If you attend shows that draw quality vendors you can buy used track that's in excellent condition. Better yet we have a forum sponsor that sells top quality re-conditioned O-Gauge track. Oh Darn! I cannot remember the name.......I think it's "The Tin-man 3Rail" (?)
God Bless,
"Pappy"