Treat the frame, fork blades and all stays internally with Weigels Frame Saver or Amsoil HDMP. These inhibited wax based "undercoatings" are far more effective and durable than any "rust prevention oil".
Stainless streel rims, even if you can find them, will likely give very poor braking performance. If they 400-series stainless for strength they won't be completely corrosion resistance and if 300series stainless, will be prone to chloride cracking.
The best external rust preventative I've found after a salty road ride is a hose and warm water followed by a dry rag.