Rust Encapsulator For Primer - Anyone Tried It?

[AU Doc]

I'll preface this with I know the ideal way to prep for paint is to media blast all rust and then prime with an epoxy primer. That said, there are situations where other options are attractive. E.g., maybe you live in a restoration blackhole where no one local either has the equipment or expertise to do the work properly. Or maybe you're just building a driver and want a driver quality paint job.

At any rate, assuming media blasting is not an option, and the rust can't be removed with just sanding.

Has anyone used Eastwood Rust Encapsulator as a primer for their paint job (on the exterior panels that is)? Eastwood claims that is one of the intended uses. Specifically for cases where there is some rust along with bare metal and even some paint/primer. I could see where panels with some surface rust and some pitting would make sense for this.