I have a 21 year old dash pad that has no cracks and has never seen armorall....

 

I HAD a 20 year old dash that also had no cracks, but saw plenty of ArmorAll

The California Duster for the dash (I also have one and swear by it for the interior) is much small than the regular duster, and it is triangular shaped so its easy to work into tight spaces

 

It's all a matter of what brand do you want to remain loyal to... Meguires is something that I was raised to use, and I will continue to use it. On the other hand, anything can cause a dash to crack it might just be a coincedence or what not, but even having your car out in the heat with the windows up can cause the dash to crack as well. IMO stick with what you are happy with, and just general know-how will keep anything from happening.

 

I`ve been using meguiars #40 vinyl & rubber cleaner/conditioner for alot of years now. This product is amazing. Its good for interior, tires, under hood detailing. Doesn`t have a bad smell and I wouldn`t use anything else. I use all meguiars products.(Not saying armor all is bad) It is kinda hard to find though. I can only find it at NAPA auto parts or order it online.