If you don't mind me asking, what made you get it dipped rather than media blasted?
The dipping was fairly reasonable about $80.00 for the trunk and it allowed me to get into ever little spot on the lid. I could hear loose rust inside the lid and I new I would never be able to get that all out with blasting. It also gives be a very clean smooth surface to work with with no possible damage to the metal.
Because the lid came out so nice I will do the entire car this way. I will than know that every bit of rust has been removed, what I can and cannot see. For about $1500.00 I can have the whole car dipped and for another $1500.00 I can have the whole car E-Coated ,lids,doors,hood,and body which will be by far the best rust prevention. Just like the new cars today.
\Just by dipping it.