P21S is great in that it is a pure carnauba wax-- so there is no shortcut. It's elbow grease all day to get that stuff applied. It does last a long, long time. I'm currently using the WaxAddict stuff from England, which comes in a microscopic bottle, is rather expensive, but works AMAZINGLY. Any good wax should help keep the frame/wheels clean longer-- I only wipe my bike down with a microfiber and spray detailer. Washes are down to 2-3 a year, even with rain riding.

Unfortunately, my other bike is (shudder) matte, so that's a whole different pain in the ass.