So… I took the gas tank off my 1929 Chevy. It looks to be in pretty good shape. It did have fluid in it. I assume it was gas at one point but not is looks more like coffee and smells like turpentine. The car has been off the road since the 90s. Obviously, the tank wasn’t leaking but has considerable rust inside. Last time I tried to restore a tank I ruined it so I was much gentler this time. I used my pressure washer to rinse out the loose rust. It is sitting in my driveway in the sun with an airline running into the fill spot to dry it out. 

My questions are:

1. What can I used to coat the inside and prevent further rust. I am going to use a white vinegar rinse and a baking soda neutralization. But do I need to try to coat the inside with something to preserve it? I woudl be forking through 2 small (2 inch max) holes to do this.

2. Does anyone know if these tanks had baffles in them? There was a lot of rust that came out during the rinse but the tank itself seems pretty solid still. 

3. Is there an internal component to where the fuel line connects? The fuel line connects on the side of the tank. I am wondering if there is supposed to be a pick up of some kind on the inside of the tank. It seems to me with the location of the fuel line connection the fuel level would drop below the fuel line long before the tank was empty. 

Thanks in advance for any advice.

Rich