Just like the title say the spine work on my Mastro Livi razors has scratched (nothing major to worry about mind) my Kanayama 55000 strop. I can live with the scratch it isnt major but i clearly cant use the strop on my Livi razors. I have an Invisible Edge strop which is more heavy duty i am using and getting good results but was wondering what strops others are using on their Livi razors?