what I was trying to describe was a knife to fit the shape of the finished glazing. the angled sides of the knife would be such as to be used as a guide to give the desired angle on the finished glaze. I have used the dap 33 before, it is a good material. I do prefer putty for glazing wood framed sash alto it is alittle more difficult to work with than the dap 33.
hope this helps with your understanding of what i was saying before.