I agree that the cabinet scraper would also work, and give more control with a pull stroke.
Tho my weapon of choice for removing (faring) the edge of the tape or cloth is still a carbide paint scraper. The keyword is "carbide". They will be located in the paint dept of your hardware store, NOT with the tools.

I use a 2 inch blade and the 3/4 inch blade (triangular, 3 usable sides).
Works for fairing, knocking the top off the second fill coat (cabinet scraper works better/faster on large areas) and removing drips. I can work on a action picture or two this weekend maybe.
DM