I'm not sure I could even tell given the dust in my household. I don't play in a clean room. 
I've had my CY-14s for 2 years now and of course they were used, purchased from Adam Cooney, so I don't know how old they are. But there's never been any change in triggering.
My CY-5 is perhaps a year old, well, slightly older but only been in use regularly for a year. It obviously gets hit far more than the CY-14s and yeah, it has the usual stick marks, etc., on it. But erosion? Again, I don't think I could ever tell.
The 303 Protecterant is great stuff as many of us have attested to over the years. It's well worth your peace of mind to get some.
Yunno, it just dawned on me that we might be comparing apples and oranges to a small degree. I bet my CY-14s were made in Japan while the OP's newer cymbals were made in China. Don't snort. I see all kinds of subtle material(s) differences in products when the manufacturing has been moved to China. Not always but often enough to wonder. Hmmmmmmm.
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Last edited by grog; 07-02-12 at 01:38 PM.
Mix and Match Heaven: TD-12 or EZDrummer, Diamond Drum 12" snare, Hart Acupad toms, Roland CY-5 mounted on a Hart Ecymbal II Pro Pedal, Hart Ride, Hart Acupad 8" bass, 2 Roland CY-14 crashes, two Concept 1 cymbals, a Yamaha PCY-10, all on a red Roland V-Sessions rack. Pads on hiatus: PD-7, Kit Toy Splash, Hart single-zone HH, Alesis DMPad ride and an entire Concept 1 kit.