after rust removal, Jerry was absolutely correct, the tank wound up have 41 pinholes, some as large as a pin head and mostly along the right and bottom front, but also on the left bottom and front. some areas, as long as as 1-1/2" were tissue paper thin. i used POR-15 and laid their patching material on the bottom which sealed the bottom. over the years, i've used Kreem, POR, Caswells and had excellent success with all products. never tried Redkopte, but heard good about it. each have their individual purpose, depending on tank condition. seems POR-15 is my favorite.
since i don't trust other people doing my rust removal, depending on the tank condition, i find total rust removal can take extended periods of time to get rust free. depending on the severity of rust, i use different approaches. and when there is granite hard dried gas, i have fund using paint remover to melt that junk right away.
i probably made a mistake using POR-15. Depending on ambient temps, POR-15 can be nearly as viscous as water. i applied it at around 60' temp, but still pretty viscous.after applying POR, there was one leak left on the front RH corner at the seam. i probably should have used Kreem, because with POR-15, one cannot lay a 2nd coat over 1st coat.... as it was, the entire area around the last pinhole was an area so thin that the hole turned out being the diameter of a dime. the tank and cowl are shop wall art.
