BeerOrGasoline
I maintain a vehicle that belongs to a co worker. CQuartz UK was applied over 2 years ago. With careful wash techniques and regular RELOAD maintenance, the coating is still visibly doing it's job.
I would say it will soon be time for a polish with Essence plus + Reload or just a full polish and re application. The car has no visible wash induced marring / swirls. it's pretty nuts.
I put the Gtechniq CSL on my dads truck and I put CSL + Exo V4 on my truck. So far it's excellent.
How about Ultra vs Light?