The s13 240sx gas tank is actually coated in some coating that easily washes off with gas. I used gas from inside the tank and was able to melt off the coating. Not too sure what it is but it is not paint.
My inside wasn't rusted so I never touched it. There's products out there that can treat the inside of your gas tank, I personally never used those products before.
So, he strips & repaints the outside, whooped-dee-doo: what did he do to “restore” the inside which is where true tank restoration counts? I’m growing more gray hairs waiting . . .