If don't want to "ruin" the Thiers Issard, look for a cheap razor you can practice honing on - something in the $25 or less range that's in good shape. Having a "reference" razor is also a good idea. I have one Lynn honed for me that I only use every 6 months or so as a reference. When the ones I hone start to shave better that that one, I'll send it back to Lynn for a fresh reference.