Help with rust
 

How do you stop or slow down rust.I just bought my 81 rx7 and everywhere I look RUST.Anyone have suggestions?The body shop is not affordable option.

Find another one without rust.

Seriously. You can get a good shell for around $100. Swap all your good stuff over. It isn't worth fixing, especially if it is the dreaded bin rot.

Rust is like cancer, so to answer your question we first need to find a cure.

if it were small spots i would suggest a rust conversion product but if its as bad as you say i think you found your answer above