What is your standard for determining "durability"?

[shortspark]

I used Jeff's Jett for the first time the other day and someone in another thread ask that I keep them updated on its "durability". I used AIO/SG and applied these every six months just to do so (this is the first time with Jett). However, the silver truck I have never gave me any indication it needed more AIO/SG. The truck is silver and it is garage kept night and day (I am retired and only take it out once in a while). It is seldom rained on and being in Texas it never gets snow, salt or sand. I wash it every week and QD often, even if it looks perfect. About once a week I also use HGAS or Wolfgangs Sealant Spritz which are virtually LSPs in their own right. Basically, my truck is a garage queen. I know this is overkill but I have the time and enjoy messing around with the truck.



The question I have is how does one determine SG, Jett or any LSP's durability if the LSP is constantly given boosts both in gloss and protection by QDs and other enhancements such as spray waxes and sealants? The LSP is suppose to do the job on its own but the easy wowo spray products out there today are so good that they rejuvenate the LSP to the point that I no longer know what is given me the actual protection (and shine for that matter). What criteria do you all use to determine your actual LSP's "durability" as opposed to the other products you use on the vehicle?

 

[Accumulator]

The question I have is how does one determine SG, Jett or any LSP's durability if the LSP is constantly given boosts both in gloss and protection by QDs and other enhancements such as spray waxes and sealants? .. What criteria do you all use to determine your actual LSP's "durability" as opposed to the other products you use on the vehicle?

See how it is after the wash, which will remove a lot of the QD-effect.



With KSG in particular, there's a certain, specific feel that I can readily discern. No question in my mind whether there's KSG on a surface, it feels almost like it's coated in plastic. After I apply something like FK425 to it, it feels different.