I use PB Natty Blue over the top of BFWD and like that combo. I too am in Socal, car is garaged nightly but driven daily and outside during the day. I get aroung 6 to 7 weeks before I notice diminished beading etc. I do however, with every wash, use some form of QD, one week a true QD CG Synthetic or PB SG, next week Opt Spray wax so it gets a boost from that for longevity. I use the QD's as both cars are dark blue and black so spotting etc is kept to a minimum that way. Oh and I just layer on another coat right over the top of everything, and clay, polish and seal every six or so months. Hope that helps.