I was told to take the processed bundles that are ready to be applied to the bow, and dip them in acetone and blot dry. Didn't try it myself, yet. Is it really necessary to degrease the sinew in the first place? It's been my experience that as long as the back of the bow is properly degreased and properly sized, the sinew adheres well. And the sinew to sinew bond is a naturally really strong adhesion with hide glue. Just my opinion. I would like to know others opinions on the necessity of degreasing sinew.