(Scotch Guard) Isn't when you hire some well armed kilted men to keep undesirables out of your home, or place of business...

Seriously, dont know about how well it would work for this purpose. I have used a pilling shaver. It works, but because it cuts the errant fibers off, It would certainly reduce the life of the kilt. (I only use it on my sport kilt.) I dont see any harm in using scotch guard on any of your kilts. I will look into it with the Textile experts here, and get back to you.