2005 Toyota Corolla Black Detailing Question

[xbbsupra]

I`m new to polishing scene and have a Flex XC 3401 VRG Dual Action Orbital Polisher. I understand the concept of polishing and had great results for my first time on my 95 Toyota Supra black single stage paint with the M105/M205 combo. I`m working on my brothers 2005 black Toyota Corolla right now and it`s tough even with the Flex. The car has a good amount of scratches. After using a Meguiars M105 with the yellow Meguiars Soft Buff 2.0, the scratches are very visible still even tho its a little better. I`m using the Flex at speed 6 with moderate pressure. Am I doing something wrong? Is the M105, not enough cutting power? I`ve never done a car with a clear coat (assuming this one has one). I`m afraid to the wet sanding ordeal.

[DS8]

If the scratches are as bad as they sound, you probably wont be able to buff them out. Does the scratch catch your fingernail when you run it across?