I do mine a little different, and they always come out very lovey.
First, a few days of lunch meat won't hurt them. Get a comfy chair with arms and a back (no gaps) and some sliced turkey. If you have food in the cage all the time, take it out, you're going to do at least 2 meals a day, 3 is better. So 2/3 times a day you are going to scruff the cat, get in the comfy chair and stick your butt way over to the side so the cat can sit on the chair next to and kind of behind you (promptly unscruff, lol). Put a slice of turkey right in front of kitty's face. Hold it, don't put it down, food comes from your hand.
Just hang out. Move very little. Keep one hand, full of turkey (or hotdogs, or similar) in front of the cat's face to keep it from bolting. It may take a half hour or more for the cat to relax enough to eat. YOU just stay relaxed and as still as possible while not letting kitty bolt. Talk if you want to. Once kitty has eaten, pick it up (gently as possible, firmly as necessary) and put it back in the cage.
After kitty has relaxed with this routine enough to begin to eat promptly (usually 2 or 3 meals) what you're going to do is feed with one hand, pet with the other. Remember, all kitty's food has come while snuggled next to you in the chair, surrounded by your body, your breathing, your scent. You are going to slowly feed and gently pet kitty until she starts to purr. Even the most nervous cat will purr in less then an hour, to release tension if nothing else. Let kitty purr for a minute, then back to the cage.
After a week of this, most cats will begin to purr as soon as they see you. This gets cats very tame very quickly. It seems to me, that when you try the slow method, where you talk to the cat for 10 minutes at a time, you just scare them for 10 minutes at a time, then go away. They take forever to go past that fear and realize that even though you've frightened them 10 times a day for 10 minutes at a time, nothing bad has happened.
With this, while the cat is petrified a couple of times, they have the time they need to relax, realize that not only does nothing bad happen, but you always bring good things.
btw, I've done this with cats so feral that when caught they screamed, bit, clawed and released picky glands. One such cat is the first to greet people at my house and rides around on my shoulders like a live scarf. Another was adopted into a lively household and is the ruler of 3 boys who adore her. When they get over the fear, they do it completely.
edited; Picky glands?? LOL the filter. In other words, did you know a cat can stink like a skunk if they freak enough? 'Cause they can.