Basically I have some rust on my car that I wanna sort soon, and thought this would be the best forum for it

even though its not a ford
The car has some surface rust underneath, and on the rear arches, but its by no means rot, so I think removing the rust could work if I find out how to do it properly.
suspension turrets:

Underside:

Sill:

Subframe:

I'm thinking a good plan of action is to buy some Bilt hamber stuff, attack the rust with a dremel/wire brush wheel on a drill, then add some rust remover stuff(bilt hamber deox), let that work then wash it off, then add some rust converter(bilt hamber hydrate 80) then when thats had a couple of coats and chance to dry put some etch primer on, then after that put on either hammerite for the undercar bits or spray some paint, then lacquer for the arches, then cover the underside bits in hamerite underbody seal with waxoyl. Would this work as long as I take my time and give it all time to cure, as i've done my arches before btu probably rushed it and hence it came back?
Cheers