Exterior = Zaino, Interior = ??
 

I've been using zaino for the exterior cleaning, results are good. Any recommendations for interior cleaning? Should I go with zaino again for the interior plastic and leather cleaning? Im a guy with very sweaty hands, and I leave a nasty mess on the leather steering wheel and plastic controls. Any recommendations for cleaning? Thanx!

404 Protectant is pretty much the best vinyl and interior swipe for your car... it replaces anything your "Armor All" would do, but better. People say it's a little too shiney but hey.. I like it.

For leather, you can use the Leatherique stuff that Rolls Royce owners love. It's an excellent product and has excellent reviews.

Invisible glass for your windows is also good.

Aside from that, nada.. just wipe down the lacquered plastic with Windex or Invisible glass and keep everything nice and spiffy :)

Out of curiosity, how careful do I need to be about getting one surface's cleaning product on another surface? For instance, fabric cleaner on the lacquered plastic, glass cleaner on the fabric or leather seats, Armor All on the speakers, etc.

as a boat owner I am familiar with a product that is usually only used on marine applications - 303 Space protectant.

It works great for interior of autos as well. Doesnt leave shiney greasy residue and has a SPF40 sunscreen to keep the interior protected from UV decay.

Somewhat expensive stuff, but well worth it. On boats you apply about 2-3 weeks, but for autos I would recommend once a month would be plenty.

Great for leather, plastic and vinal. Not good for glass.

Edit: 303 not 404, sorry.