You really don't want to do that. It will give it a shine that when the sun hits it, you'll go blind.
Besides, when Armour All or Son-of-a-Gun type of stuff starts to wear off, the vinyl (or rubber if you use it on tires) looks worse that before you put anything on it, so you have to keep using it over and over, until you find something that's better.
All my opinin though, and you know what they say about opinions....everybody's got one, some bigger than others.
