Actually, upon reading my guide I linked again, I remembered that the scoring of that glue along the warp field grille was fruitless, the nacelle came apart along the opposite seam anyway. What was important was getting the front end apart, and getting a pointed tool like an awl into the little gap at the narrow point of the warp field grille's fan-out bit behind the bussard assembly.
There's a colour coded diagram in that link I mentioned the other day... I can see the pictures, but they're potentially down for everyone else - so let me know if they're not showing for you.
Again, best of luck!
I'll be sure to try that, thanks!