I just got my boat off the trailer and flipped it over and found a good bit of pitting. I don't know what is causing this? It is all taking place where the boat sits on the trailer bunks. They are carpeted. I use this boat 99% of the time in salt water but I do rinse it off every trip. I live two bocks from a boat ramp on the Hillsborough river so I just back it down that ramp and rinse the trailer and flush the motor. I just order some Steelflex, should I fill the pitting with something or just let the Steelflex fill it in? The boat is an 1986 15x48 Starcraft. Its not new but I did not expect such deterioration of the metal.