Best I have ever used and I have a turned a few wrenches in my life.

Can I break down what can be done as in a "Cliffs Notes" version of how to remove stubborn threaded fasteners of dissimular materials? Please, thank you, I will anyway! lol

Steel bolts threaded into aluminum is a disaster to begin with unless the bolts are coated with something like never sieze. Somebody mentioned electrolysis. That can also be something else like galvanic reaction which is pretty much the same thing. What happens is the steel bolts going into the aluminum will actually weld themselves together on a molecular level when you add in extreem temperature cycles over time.

How to remove those stubborn bolts.

You have to break down that molecular bond. Start with something like PB Blaster overnight and the shock method I mentioned earlier by tapping with a light hammer. You have to use a "LIGHT" hammer. It has to be a sharp tap, not a heavy blow. Use a good quality wrench and if it's a allen head, use a precision ground tipped one like the car guys use.

If that still doesn't work, run temperature cycles. Throw it in the oven at about 250*F for an hour, then toss it in the freezer for awhile if you dont have environmental chambers and an engineering lab like I do!

Wash, rinse, repeat! Works every time!

Edit: Im running some tests at work on some 6-32 screws torqued to 6 foot pounds with, and without nylon patch. The tests will be ran over several days at -40*F to 140*F. I doubt the nylon patch can handle the high heat extreems of RC engines, but I can test something else if anyone is interested.