Letdown: Durability and slickness of P21S
Surprise: Megs white/black wax - best AIOs I've ever used.
Surprise 2: Pinnacle series 2 wax - quick and easy to use with good durability and slickness.
I think someone did a durability review in the review section.
Found it: http://www.autogeekonline.net/forum/product-reviews/62798-xmt-360-vs-d151-prc.html
I usually leave the iron x bottle in a large ziplock bag or in a bag with a rubber band around the bottle. It really helps cut down the smell.
I'm used to the smell by now though lol
To op: I haven't seen or heard of a spray on - wipe off wax/sealant that last 2 months or more. That's a pretty tall task for some traditional wax and even some sealants. Of course, I may be wrong, I haven't used everything that's offered out there. If you need a weekly topper or booster to...
Meg's white or black wax, both are probably available anywhere.
If you can get past the silly tube container (I transfer the contents to a squeeze bottle), its probably the best aio that I've ever used.