I guess you have the 2011 Enigma mast serie (top half with bare black carbon; bottom half with red plastic coating) and not the 2010 Enigma mast serie (top and bottom halves with red paint and no soft plastic coating) ?
The problem is coming from the red soft plastic tape coating only. The coating is way too soft to resist normal wear and grind by the camber rotation.
After 1 year of use, I have the same scratches and same damages of the red soft plastic coating on my 2011 Enigma 550 cm mast bottom while rigged in a 2011 Reflex II 11.0 m2 sail or with a 2011 Enigma 460 cm mast bottom while rigged on a Code Red 7.7 m2 sail. The worst scratches are indeed caused by the most bottom camber of the sail. I just tape the damaged area with Duct tape and change it from time to time. It is important that the carbon surface of the mast bottom does not get grinded by camber rotation.
No problem so far with a 2012 Enigma 490 mast while rigged in a 2012 Reflex III 8.6 m2 sail. Unlike the 2011 Enigma mast bottom, 2012 Enigma mast have no soft plastic coating at all. Mast surface finish is hard.
Just for the record, none of my mast breakage did occur because of a camber having grinded and softened the mast at that location. They all occured either at the boomhead clamp/jaws/strap (because of a point load), at the mast bottom extension, mast ferrule or mast spots located anywhere between cambers...