Order of assembly? From a bare shell

Great idea on the tape it off, pour it in and dump it out. Factory used to submerge these cars in a 3 stage coating if I remember correctly. these cars were dipped after the shells were welded together for rust preventative measures. Rustoleum is pretty bad assed ****. I will prob use some of that PPG 512x310 light gray epoxy primer coating I have to do that. It's tough as nails, and free to me when exp. date comes up. Cant use on aircraft after that. LoL