That sucks man! Sounds like the coating isn't meant for longevity but more so for one off applications. It's no wonder why the Rockshox pro's have their forks swapped out all the time! What happened after the coating rubbed off? Did it turn into a matte black?
Nope doesn't gone matte black but it had rubbing marks & the coating started to scratch.It was in it's early stage that the coating started to give away and at that point I had to stop riding.