BrettW,
Armor All has been the death of many vinyl dashboards in cars. That stuff is a good example of a poor product that has had outstanding marketing. Having been a used car dealer for years I won't let Armor All near anything I own.
Many petroleum based products will damage rubber and plastic. For instance, the instructions for the dump valves on my RV specifically states not to use petroleum jelly on the rubber seals because it can cause them to swell. I am supposed to use silicone only to lubricate them. However, I don't think silicone is good for plastics.
There is product called 303 Aerospace Protectant that is pretty highly rated. I use it and have had no ill effects so far but it is $60 a gallon. It is recommended by several suppliers of RV parts for rubber seals, for example, Fantastic Fan Company makes powered vents for RV's and includes a small sample of 303 with each vent for use on the seal.
Michelin, at
Miichelin Warranty states:
"Tires which become unserviceable due to alterations
such as truing, whitewall inlays, addition of balancing or sealant liquids, or the use of tire dressings containing petroleum distillates, are excluded from warranty coverage."
Appears that Michelin considers petroleum distillates so bad for tires they will not honor the warranty if you use them.
I checked BF Goodrich's site and they say the same thing. Oddly, their wording is exactly the same so BFG may be owned by Michelin.
Bill Tolle