Cab rust repairs

[DoubleL]

Well I tore the carpet out of my truck today and found a lot more rust than I had hoped for. Looks like the PO laid carpet right over the mess. A few shoddy patch panels as well.
I didn't want to double post a bunch of pics. I have a write up in my build thread in my Signature.
I am wondering if I can clean it up as best I can and just spray rust-encapsulater on it until I can get to it in a few months.This is my DD and I am not going to be able to buy patch panels and stuff until after the first of the year. Thanks guys for any advice.