I'd be worried about slipping with the razor since no matter how careful I am I almost always do. I'd cover the fork legs and crown with a heavy plastic bag, mask the area adjacent to the steerer tube, mask the steerer tube above the race to keep stripper from getting on the threads and oozing out later, hang the fork upside down and use a small brush to carefully apply aircraft stripper to the affected area. That should keep any stripper from getting on the exposed paint. Might seem like overkill but better safe than sorry. Just my 2 cents.