I have used diesel and gravel before and hauled a tank around in the back of the pick up for a couple weeks but it was a piece o' junk and turned into a screen door and I agree about E 85.Sounds like I'm left with POR 15 treatment just hoping for something less involved.
I tried local radiator shops for a dunk and that's a no go.And the local metal dip place wants $100.poot