No problem. Been there, done that!
Remember to wear a respirator or *good* particle mask! Dremels will eat through fiberglass quickly, producing LOTS of dust! *cough*
You know thats kind of funny, see, when I was working on my BKBT cutting out everything, and sanding, and what not, I considered this the first time (which my girlfriend almost killed over for me not using it later) using air way protection, wrapped an old t-shirt around my face the first day, after that, I just didnt use anything. Stupid? Yes. Anything happen? Nope, and Im proud to say so. I merely aimed the spray from the dremel away from my face as much as possible, and held my breath, but I have healthy, strong lungs, I mean after all, I am a Tuba player.....
-tubachris
(Who wants to break the world record for holding the longest note one day, because I can circular breaht, and havent brought myself to dedicate at least an hour to do it, or have people from Guiness to come down to record it, becuase im too lazy sometimes)