Try some PVC coated wire with metal nearby- in every Fastrack switch.
The gas produced from overheated and/or burning is both toxic and corrosive, PVC Health Hazards
- hydrogen chloride, which is a corrosive, highly toxic gas that can burn skin and cause severe, permanent respiratory damage; and
- dioxin, the most dangerous known man-made carcinogen, which will persist in the environment for a long period of time. PVC is the largest contributor to the world’s dioxin burden.
Picture does no justice, the instant corrosion of the metal cover is just crazy. I've seen similar "rusted" metal components in locomotives when similar PVC wiring burns from a derailment short. Again, this darkened area looks terrible but even worse likely will begin rusting.
