Striker- "TSO" = Meguiar's Trade Secret Oils. Both M105 and M205 leave them behind, but IME the M205 is more likely to cause issues. I clean them off with Akyra Clean (I think that's the spelling, it used to be called "PrepWash" and it's sold by Top of the Line), others use Eraser. IME the common approach of using IPA/Rubbing Alcohol is not very effective for this.
Note that TSO aren't entirely a bad thing when dealing with ss, especially old-tech ss paint. In certain cases the "feed the paint" thing is *NOT* just BS the way it is with b/c paint. But I don't like the way M205 TSO can mask problems you want to see/correct or the way it dissipates, which is different from how the oils/etc. in Meguiar's Pure Polishes gradually "die off".
Eh, SS paint can be a bit of a, uhm....involved subject and I don't mean to over-complicate the whole thing. Compared to b/c it's truly "the same thing only different"!