I'm not sure but since about January I've noticed Klasse has started to comply with VOC standards. One vendor told me that if you are a non-Californian and tell them so they would send you the old version. I'm a big fan of Klasse VLRP on black plastic chased by 1Z Vinyl and Rubber for UV protection. The new VLRP is nothing at all like the old so I'm guessing the new eco standards are tough.
I don't think I know anyone who clays enough. Probably a good thing becasue not turning the clay enough can do more harm to the clear coat than help it. I often keep a soapy bucket nearby to wipe off the debris
and only then turn the clay. not doing this is crazy to me, some bit of sand/sediments could press through from the center and you've made your own sand paper
.
If your car is driven daily I would use a mild clay like SOnus Green every other wash. The softer compound will remove the crap without stripping your sealant and dressings. I often do this during a wash when the car is thoroughly lubricated with suds. I think SOnus has the only mild clay (on Autopiacarcare.com).
Before using a cleaning polish every 4 months like Klasse All In ONe or Menzerna Intensive Polish (and or a swirl remover) use a harder more traditional clay like the inexpensive Bluge Magic or Mothers, Megs etc. This is where you want to strip everything down to the clear coat.
Either way if you any paste wax dressings or cleaning polishes you should alway clay first.
Claying is always a noticeable improvement mostly because of the pollution you can't feel on the paint but is dulling the shine.