efnfast- I haven't had a 'vette since long before I discovered 1Z polishes, but I've used those polishes on some pretty hard clear.
As you found, the Pasta Intensiv/green doesn't do all that much correction. Via Cyclo, the Pasta Intensiv just doesn't seem to do nearly the aggressive correction it's capable of via othe means (and I *do* love my Cyclos anyhow).
I'd use at least orange pads for this, and if you have access to a PC with a small backing plate and 3.5" PFW pads, that combo is *much* more effective for serious correction on hard clear with Pasta Intensiv. This pad setup on the PC is much more aggressive than foam pads on the Cyclo IME.
Despite how gritty it feels, the Pasta Intensiv breaks down pretty easily, especially via Cyclo (due to its fairly high speed relative to its throw, or at least that's how I figure it). You can do *more* aggressive work with it by hand, oddly enough, but you gotta be a little careful as the gritty abrasives' initial bite can cause some pretty serious "tracer" scratches, almost like wetsanding, if you do it wrong...and doing it right/wrong is something I'm hard pressed to explain over the internet :think: By hand, you can't press hard until after you get the abrasives broken down a *very* little bit...just enough to avoid the tracers but not enough to diminish the cut too much.
Gee....I bet the preceding was probably not all *that* helpful

Maybe
Bence could offer you some better advice.