We have had incredible results using Spotless Stainless. We have been using it for 10 months now and it does do exactly what it is supposed to do, including retarding rust, just as it claims to do.
As an old timer with a lot of commercial vessels in my background, phosphoric acid (Ospho) was my go to product for rust. But as the quality of stainless seems not to be what it once was, the acid did clean the rust off, but it also seemed to actually be increasing the returning rust.
After reading here about Spotless Stainless, we bit the bullet and spent the big bucks.
It works. There is a learning curve, it can't dry so we cover it w/ plastic shopping bags wrapped around the areas it's working on, etc, but it should work great inside on chrome w/o a lot of hassle.
It has actually decreased the return of rust topside significantly, I swear! We never wash the boat after a sail, and we get a lot of salt on everything, beating between the islands down here.