Hello,

My father used potassium permanganate for as long as I can remember back to use when he had a sore throat/infections in his gums but also when during our holidays we caught a fungal infection between our toes, I think you can that athletes foot in English.
The recipe for a mouth "wash" solution was simple put 1-3 little potassium permanganate crystals in a glass of water and let them dissolve, the water had to have a very light pink/purple colour then it was OK to use.
Gurgle with it and spit out, it worked for him and my sore throat also got better when I used it.
For athletes foot, just fill a plastic wash basin or bucket with warm water and add more crystals, the water could really have a good purple colour, put your feet in and let them soak worked great. This happened as far as 40 years ago and I’ve stayed using it ever since.

I think REI used to sell a chemical fire starter or even still does, I’m not sure it used/uses potassium permanganate however.
I tried potassium permanganate and glycol myself and wasn’t successful in getting a fire going, I guess they Light-My-Fire Firesteel is still one of the best fire starters around, it never failed on me yet.

Cheers,

Bagheera