Aragon,
I'm no chemist but I thought PTFE had no cleaning properties. In fact it will leave a residue on the applied surface so if there is any contaminate or particulate this will be sealed in. But I imagine that if the surfaces are clean to begin with (as no doubt yours were) the residual coat will act as a protectant against further contamination, at least to the body of the cutter.
I use PTFE on all my cast iron beds and as lube in areas prone to sawdust such as the gearwheels on the TS etc. The Trend variant seem ok so I must try it on my cutters. As mentioned in an earlier post the CMT cleaner works well and is nice and user friendly unlike the various "oven cleaner" products that are available.
Rgds
Noel