Ron I always tape the edge, only problem is it's really hard to remove the tape res really that is that close to the clear bra line. I found IPA dabbing is easiest way. If you scrub youll scratch the car for sure. If you dont tape. Use IPA on a q-tip to disolve and residue on the line. It looks really bad if you leave it white. Also if the bra's been there for any extended perieod I notice that the edge tends to get dirty or stained. If you use straight IPA on that edge you can get the build up off of it and it looks much better in the finish product.