auto glym bumper care is still the daddy
too 'silicony' imo and ruins your suds
depends how you use it, i buff it off once applied, lasts around a month, i use 2 rags to buff it, fantastic results..
after each wash i just buff over it with the cleaner rag out of the 2 i use to apply it, brings it up shiny again, as said above, just re aply monthly