In thinking about this & confronting the challenge myself this is what I think I’d do next…
In front of the lug at a location of your choosing, put down a tape barrier for a couple inches to capture the ‘forward overflow’
At the tape line junction, there will be a precise point where the bedding compound is no longer attached to the stock substrate & will be easier to trim back to that point with a razor knife skor.
I’ve not done this so I could be full of buckeye balls but I fully understand your question & have wondered about solutions myself.
Yes, scoring a line through the bedding where the tape edge runs works. You can then begin to pull the tape it will pull right along the scoring line. Sometimes you have to use an exacto knife to help it along.
