I switched to E1 for the glass but still use BBS on the seats. Think it is slicker and after a light wipeover with a towel once dry there are no streaks. BBS seemed to take a little more effort to get the streaks. Someone here had a thread about the E1 stuff in gallon jugs under a different product name and i have gone that route. Can't recall the other name and not home to check for a few days, but it is the identical carnuba based stuff. Ordered it from some RV supply place online.