2 years ago I replaced my calipers with Raybestos OPTI-CAL line of brand-new non-remanufactured calipers.
A quick inspection reveals that the guide pins have already been torn and the caliper piston dust boot is cracked and torn as well--------2 years!!! The OEMs that it replaced after 12 years of service were still good (the rubber boots that is.)
So, this unit still works but I’m going to pre-emptively replace it with a CardOne remanufactured unit (wearing the WEAREVER brand) from Advance Auto.
Question is: should I generously apply Sil-Glyde to it (even on the outside.)
YES, it will be covered in brake dust but that won’t impair its functionality