Funny I've been using ArmorAll on my dash/door cards/steering column etc, on both my cars, for several years - no cracks!
But I'll look into Mothers Protectant just coz Saint says so.
For polish I use Sonax, which is a semi-abbrasive - gets rid of some of your little scratches with hard rubbing, but doesn't damage your clear.
I also recommend Nu Finish which recently began production again after demand when it had ceased.
For exterior plastics/trim I use Meguire's Trim Detailer (the best!).
Tyres - generic tyre shiner (spray).
Engine bay hoses - either tyre shiner or trim detailer, but the trim detailer always lasts longer on all surfaces.
Metal - Meguire's Metal Polish. Autosol is overrated.
Windows - that Super Cheap garbage gets the job done.
Degreaser - as above.
http://i87.photobucket.com/albums/k1...X/IMG_0612.jpg