New MB Project - Rusty Fuel Tank
"I opened the fuel tank when I got it home and it's full of rust"
By no means unusual. The next thing to think about is that just about everything uphill from there is full of rust and crud too. Fuel lines, filter, fuel pump and fuel lines to carburetor.. On yeah, probably the needle valve in the bowl.
After watching a lot of folks start rebuilds, the best idea is to put a filter between the tank and the fuel pump and another ahead of the carburetor. Catch that stuff anywhere it shows up!
What shape is the engine? Tried anything with it yet?
Show us pictures - we're already curious.