I did try tights many years ago and they do work well. Unfortunately I think my customers especially B&O stores would raise their eye brows if their frets turned up with a pair of 40 denier tights wrapped around them!!
Also as we trim many pairs a week we have to consider the time it takes per pair to Make them cost effective, I can trim a pair in under 30 mins but we've had to make jigs up to hold them and the cloth.
BL8000s are the trickiest fret to trim in my opinion. Well to make them look like they have come straight from the factory. I'd love to know how they do them in Denmark. The machinery must be amazing!!