LazerRed1- That is just *so* cool that the 'vette is still original after all those years!
SS white, even lacquer, is generally very hard, so I don't think you need to worry *too* much about being too aggressive. So either Menzerna product oughta work OK. But OTOH it's only original once and to have one of that vintage still in the original paint is really something.
So I'd do the least amount of correction necessary to make it look OK and then stick with the Meg's #7 approach. After 45 years stuff, like marring is what I consider "patina" and I'd hate to take off much of any of that paint. After *another* 45 years, you won't have been the guy who" took off so much paint back in 2007" that it eventually had to be repainted. I'd only do a very gentle polishing, just enough to remove any oxidation and bring up the gloss a bit, but not enough to really correct any significant marring.
In the future, I'd use some kind of non/barely abrasive paint cleaner every now and then to remove the #7 (and/or any new oxidation) so you don't get a build-up of "dead #7" and other dulling stuff on the paint.
If you want to put wax over top of the #7, I'd probably lean towards #26 now that #16 isn't commonly available. But plenty of showcars/garage queens do fine with just #7 on them, and this is *exactly* what it was made for- use on lacquer paint (the original name for #7 was "sealer and reseal glaze").