I tried Blue Wonder and it left me wondering what it was doing, don't waste your money. Most solvents will work great on one thing and not the other, I use Boretech's "Eliminator" copper solvent. Along with that I also use Slip2000 Carbon Killer to be sure that it all comes out.
The only way to be sure that you've got it all is to buy a bore scope, carbon and copper can build up in layers.
I see the world thru bloodshot eyes
Streets filled with blood from distant lies
The dogs of war never compromise,
No time for rearranging.