When the beading on my vehicles changes, I interpret it as *something* having changed, and not for the better.
Those tiny spherical beads that just *barely* contact the paint, which are only like that after a fresh LSPing, don't stay like that forever and the sutble change makes for a simple indicator that the LSP could stand refreshing (long before it really *needs* redone).
The beading is almost always the first thing I notice a change in, long before slickness starts to drop off and I *never* let things go so long that the appearance has started to degrade.
So if I don't go by the first-appearing indicator, what *would* I go by? :nixweiss
Protection? I leave bugs/bird bombs on freshly Collinited/KSGed paint all the time, and I hardly *ever* get etching from it. My other LSPs don't offer that kind of protection (the paint gets etched during the course of a long roadtrip), and not-LSPed paint etches *very* quickly from stuff like that.