Don't go anywhere near your rotors with Meth's! - It leaves an oily resifue which will make your brakes worse. Also, I really can't see how smearing mud all over it will help them bed in? This will just get the pads dirty and will defeat the point of cleaning it all in the first place. Follow Keul_Muel's advise, apart from the mud bit. Just clean it all, pour water on, ride a bit to get the rotors hot, and pour more water on. Just keep doing that until you're happy/tired.