Hello, and welcome to MTO! You are correct in assuming the scale color goes all the way through. They can be removed and replaced as well if you so choose. eBay is one source for replacement scales, but there are better sources and I am sure someone else will be along shortly with a link to them. If you go that route you can make it any color you choose!Sanding it and buffing it would save you a few bucks, and I while have never personally done it, it should work! (I mean you probably did get a used SAK to save money, dropping another ~$10 for new scales kinda defeats the purpose, right?)