The Micarta on my Boker Burnley (so it may not be the same micarta, I'm not sure as I don't have a Pipsqueak) got very dark green after a few weeks of carrying it, from the dirt and sweat and oil on my hands when I was handling the knife at work, and just whenever it was being used, so a few nights ago I took the scales off the knife and gently scrubbed them with piping hot water and a little odorless hand soap, and they went from being shiny and slick in texture, and solid dark green, to almost khaki in color with a few green stripes/sections and textured like denim (which is a look and feel I LOVE on this knife, so I will be cleaning my scales regularly). If the micarta on the Pipsqueak is like the Burnley, I would say there is no need for any kind of coating on your scales. They are tough as nails, and micarta is a great material that has been used for ages in this role. No need to worry about durability.