need help with subframe rust

[sky jumper]

attached photo shows sub-frame rust on my ’99 Nissan Maxima. I’d appreciate some input on how best to treat. my current plan is:
1) wire wheel as much rust away as possible
2) treat with Naval Jelly (I can’t dip it in a liquid)
3) Eastwoods Rust Converter
4) Eastwoods Rust Encapsulator

I’m not sure if I need to use both Naval Jelly and RC. I’d rather remove the rust than leave it on and “convert” it, but I figure if I can’t get rid of it all I’ll convert what’s left over.

thanks.

[Author]

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