Hi, i have a black car. When looking at nearly a flat angle to the car panels i can see thousands of swirls but also what seems to be ALOT of light scratchs. I have gs-27, meguirs scratch -x. Which one is more aggressive. Would it be okay to go over the whole car with a coat of the less aggressive one withouth harming the clear to much. I would then top with BF Polish and PAiint Prx. From my understand Meguirs 2.0??? and 3M SMR??? are only effective with a buffer, what other products would you recommened to get rid of swirls, scratches which seem to be in a horizontal line when looking a certain angles which can be removed without a buffer. THanks