Note that *any* shampoo will eventually clean off LSP just as it cleans off dirt.
While I use it primarily because of the lubricity and encapsulation (hence less wash-induced marring), I've found that Griot's Car Wash doesn't strip LSPs much.
The Griot's seems to have *zero* effect on KSG, FK1000P, and Collinite. It's not quite as gentle on less durable LSPs, but it's still very gentle in this regard.
