I recently bought a Squier CV 50's SCPB, and it has the thick single ply white pickguard on it. First bass I've ever owned with one. But I got to thinking, it was probably early 60's after the gold anodized guards when the W/B/W guards showed up on the Fender basses. I just wonder why multi-ply... is it purely for aesthetic reasons or was there some advantage in constructing multi-ply guards? Are they stronger or more durable over time and perhaps less prone to warpage?