Simple question really, I've always used the Meguiars stuff on my Brilliant Black S3, but I only do it once in a blue moon, as I hardly drive the thing anyways. But last Xmas, I got some Swissvax Best of Show as a present, and doing some light research, it's not cheap! So which should I apply to my car for best results? I've also been told the Best of Show stuff works on plastic too with no white marks, so leaning towards that, but would still like a second opinion. Thanks.