Gotcha. I guess I don't worry about it where I live. Rust is basically non existent here. I did spend a lot of shop time in northeast Wisconsin and saw plenty of what you are referring to. I have changed dozens of Draw-Tite recievers that were rusted from inside out. I think they must have had a few-year bad run with their powder coating guys. It doesn't seem to be much of a problem any more.
That frame looks really good. One of these days my '67 will get the same resto-treatement you're giving the '88.
That frame looks really good. One of these days my '67 will get the same resto-treatement you're giving the '88.