Mine has been waxolyed, I’ve also used dinitrol in the past. This is really is a must for our cars & needs to be done about every 3 years depending on how it’s stored or at least monitored.
Mine is in a heated and ventilated garage, obviously if you are in a damp or salty climate then it requires regular checking.
Some older cars are having horrendous problems with subframes rotting due to a lack of treatment.
