Dose anyone know is there realy any point treating chassis to stop the rot.After some research i have come across some stuff called por 15 wich sounds like the dogs b####ks.Well the waxoil i used before dont seem to have had much affect well apart from it passing its mot due to being coverd in the stuff.I noticed some pealing so wire brushed it and found hole.Only i heard mention that they rot from inside.So my guestion is there a point as you are covering potential problems.