Closed procedure to shave bump?

I've had a few surgeries all open. I had irregularities on my bridge and thin skin as a consequence. I hit my nose on my bridge and it made the bump/irregularity stand out even more. It's not bone but cartlidge (septum or graft or both). I recently met with some docs. One mentioned going in closed and gently shaving the high ridge and then using fascia. My question is this procedure safe even though I have grafts in my nose and have has a few surgeries. Thanks!