The squeak comes from the spring rubbing against the inside of the shroud every time the spring contracts or expands with the swingarm motion. Can't hear it under way, obviously, but when stationary, especially when mounting the bike before starting, it's rather annoying and not very cool. I can fiddle with the shroud angle and rotate things around so they're quiet, but they find their way back to rubbing in short order.
Roeland, the shocks are silent without the metal shrouds installed - I just went for them because I like the look.
I'm guessing a rubber o-ring would get muscled out of the way with spring movement, which is why I thought I'd go for a slippery plastic sheet lining of the shroud. But I spend a ton of money (
) on plastic which I may have trouble gluing in place. Scott, double-stick may work, but I don't want to add too much thickness.
I guess I'll just experiment with what I have and go from there...