Chemicals, copper BB's and time, will that work?

Now that I  have cleared the valve, and drained the gas, I can start attempting to remove the thick sludge and calcium build up that remains in the tank. I spend some time today researching different methods and I was shocked to find how many there are. I started today by dumping a bag of BB's in the tank, along with a half bottle of CLR and some dry gas, I shook the tank vigorously and left it sitting with the top on so the chemicals can soften the grime. Tomorrow I will shake more, and if it fails and there is still grime built up, I will powerwash the tank with hot water (I have a steam generator at my disposal).