Hello All,
I hope these questions do not appear dumb, but they have been on my mind for some time, and thought I would ask them here as some of you may have experience with this?

Have any of you folks ever used some of these permanent type coatings from companies like Optimum, CarPro, GTechniq, etc, to seal, protect, and stave off tarnishing-oxidation on metals like Aluminum, Brass, Pewter, etc with good results?

I know in certain instances, one would usually seek some sort of spray on type product, as a laquer-varnish.

Can one get comparable lasting results with such products available here?
Thanks, Mark