+1 for 303 protectant
Purchase at your local marine or rv supply
West marine located through out the country sells gallon size containers, works equally well on plastic and rubber(not tires)
CAUTION: Use care with peanut oil when riding in heavily dog-populated areas!
2009 R1200RT, 2007 Shadow Aero 750 (sold)
2012 MINI Countryman S, 2004 MINI Cooper S JCW, 2000 BMW 328i
I use 303 on the nylon wings of my ultralight aircraft, works great, it also looks, feels, smells and tastes just like armor all, it costs 3 times as much.
I had heard that clear peanut oil worked great for cleaning and dressing black plastic, but my wife already had some clear walnut oil so I tried it instead.
I was dubious at first, but it worked perfectly at restoring the plastic and didn't leave a shiny film. And it's cheap.
I had previously tried all sorts of plastic cleaning products including Armor All which were no help at all.