TBH mate, there are FAR better things on the market than Turtlewax Colour Magic. For starters it's almost like a make-up foundation rather than a proper polish - quite crude in the way that it fills swirls rather than removing them, and doesn't offer much (if any?) paint protection. So whilst it might look quite good immediately after application, it won't last long and you'll end up with the exact same finish you had before all that work!
AutoGlym SRP is excellent stuff for working by hand. And it's a proper polish so will remove swirls rather than filling them but to finish the job you'd want to apply a wax on top to protect the finish and enhance shine. Not only would you
remove the swirling that comes with using some clays, but the wax afterwards should give a finish that far surpasses that offered by the colour magic.
