Graphite reamer
I am a Boro newbie, ( very new) and am currently using a graphite drawing stick with Boro. I scrubbed the plastic coating off it, and it works just fine. You can buy them in different hardness just like drawing pencils, I have the HB, figuring that it would be the hardest and least messy. It sharpens just like a pencil, but without the wood. About $3 each around here.
KMD
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