Tiger,
I find it to be a reasonably durable finish. For example to clean up the braze on bits I need to use some sandpaper or emery cloth to clean the bits down for best fit. Of the ten or so I have has done none of them chipped or were damaged by the rough handling here in the shop. They have fallen on the concrete floor and gotten no scratches or scuffs. I would recommend a coat of Meguire's wax before assembling the bike. It brings out the shine of the finish a bit. I will be starting a build thread of my latest frame that went in for PC. maybe it will help a bit. Smiles, MH