I own a 12 year old boat. The fiberglass is getting chalky and probably needs to be painted. An "old salt" suggested that I could wait a few more seasons on the paint job if I washed the boat really well then went over the hull and decks with a mop soaked in Armorall. this might work well for the dash of the car but I have never heard of this on a fiberglass boat hull. Is this dangerous or a real cure? What are your thoughts?