I'm in the same boat. Some peeps I know have had good luck with POR 15 and others not. Me thinks it's the person doing the work more than the product. Which is why I'm looking for a professional to coat my kz tank.
Thanks for the thoughts and opinions. Tank sealer sounds like a nightmare if something goes wrong. I keep reading people say, they followed the instructions to the letter and it still went wrong.
After a week of electrolysis I still had rust at the bottom of the tank. So I used some Phosphoric acid overnight and it looks like new in there now. I made sure I neutralized the acid afterwards.
I may just forget the tank sealer and always keep it full of fuel in future...see how it goes.