Many of you have probably experienced this - both the look and feel of canvas micarta can be influenced by oil from your skin (or something like mineral oil intentionally applied to alter the look). The Busse I use the most with canvas micarta is a 1/300 SHBM with smooth grips. Years ago it seemed like the grips were getting slippery, so I soaked it in a solution of Dawn dish detergent and then used a tooth brush with soft bristles to gently scrub the grips. Not only did the cleaning noticeably improve the appearance of the micarta, but it also felt better. Even a Busse knife needs a bath once in a while.