I tried the totally awesome a while back and it's hard to see any difference in cleaning when you introduce a prep brush to the equation. I just went back to the pre soak I use in my SS bays as I have a filling hose / ball valve on the bottom of my mixing tank which makes it much easier to fill than mixing the other stuff.
Look at the SDS totally awesome is nothing more than a degreaser with some solvent and caustic in it. A 1/2 cup of decent tire cleaner out to work better.