I used Meg's wheel brightener for the first time last night on some tough, tough baked on brake dust. I first used my favorite P21S Gel and it worked okay but Megs wheel brightener is something to respect wow, this stuff is super strong and it actually smelled quite nice, I wasent expecting that.
Any who, I used it diluted at 4:1 and it worked great...you'll see on the next detail I post up. But
I would consider Megs wheel brightener as a last resort.
As for Chemical Guys premium blue, I can't really coment as I've never used it
