Thanks Chris.
I was wondering about a "Rust converter" and not a encapsulater.
I'm on the firewall/cowl and the frame rails, rad support. No inner fenders since the late B body cars have them bolted in. I have small time windows in which to work in. This makes the process slow. I have a lot of exposed metal at the moment and a few good days until the next forecasted rain on Sunday.
I would like to produce a nice firewall. Since everything else is some why hidden and less of an attention getter, a show quality finish is not expected. I would like a nice driver since I'll be driving this everywhere. But certain area can and may lack. This, I'm OK with.