For the LCP I don't see the draw for the stainless gun. I have had mine since 2010 and it gets pocket carried every day. It has been sweated up more times than I can count and I have some bluing that is thinning on the high points of the slide but there is not even the slightest freckle of rust anywhere. A good cleaning and a gentle spray down with Eezox about every month keeps it rust free.
If you want it for the aesthetic aspect, I get that, but from a corrosion protection aspect, I think that the factory finish on the current LCP works fine.