I think that this treatment makes the components look great. I wonder, though, if it would have been a better idea to instead invest the cost of the Chemical Guys product on better components. I completely understand the desire to restore bike parts, and also hate to toss something that is functional; however I remember the short life of the Simplex gear on a Peugeot I had in the 70s. That Delrin stuff was light and worked very smoothly.

Anyway, my post was me thinking aloud (in text.) Faced with a somewhat fragile old mech that was still functional, I would have done the same as you.