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@Gary Samad - thank you for your post. I actually held off doing the "Disc Brake Quiet" because of what you said. Also, I can't find any cases that are confirmed of using "BG Stop Squeal" on Carbon Ceramic Brakes. I did find a random post from someone online who claimed it would ruin CCB - so I contacted BG Corporate, and the person who replied said it can be used on CCB. So, just in case the person replying was not totally educated on their product (i.e. rookie), I ended up just doing the BG Stop Squeal on the offending wheels' brakes (I have a spare rotor in case this stuff actually ruins the one on the car).
You are supposed to "rough up the surface", but I sanded the pads quite agressively to remove any shiny surface on the pad. Very easy to apply - a little thicker than water, maybe model paint consistency. It leaves the surface of the brake pad a "flat grey" color. It looks like I spray painted them with flat grey paint. Although it looks like it is being absorbed over the 15 minutes you are supposed to let it sit to "absorb", it very well could just be evapotating and leaving behind the product on the surface of the pad, as I know one of the main ingredients is isopropol alcohol (according to the product data safety sheet). There are a few picks online, but I will post my pics of it below because I may come back and post additional pics after they have some miles on them. I put it on the edge of the pads too to make it "look" better. I also very lightly coated the back of the pad where it contacts the pistons with purple permatex ceramic extreme brake grease. Did the same to contact points on the pins and springs. I've tried lubricating in the past to no avail. I am aware that they are usually fine being dry, and it is not recommeded to grease any of these components.
As I stated earlier, I am usually able to remove the noise for a short time by sanding the surface of the pad. I've done this numerous times and when I do, I can tell the noise is going to come back because faint hints of the low tone return in about 100-200 miles of the sanding.
For everyone who wonders about the Hollywood Mechanics theory and the overlap of pad onto the soft surface of the disc causing a ridge: On my last set of pads I dremeled out the 1cm center ring of the pad where it contacted the innermost part of the rotor surface. I've also chamfered the leading and trailing edge of the pads. Neither worked for my low frequency noise (~500hz).
