IMO I wouldn't use t-cut. T-cut is cr*p.
t-cut stays abbrasive during the entire process that your polishing, the more you polish, the more scratches you are gonna inflict on the paintwork.
Use something like Meguiars Scratch X. Starts off being abbrasive, but as you are rubbing it in, it breaks down, so therefore at the end of the process, your are in effect polishing.