I dont epoxy first but sealer gets in there too. I have an old dull band saw blade that I've cut up with tin snips and just pull a short section of that that through the slot and wipe it off. If I dont catch it before it dries, or I'm refinishing pugs that have epoxy in the slot, I've held a piece of the blade in vice grips and heated it up with my little torch til its glowing and then pull it through, goes thru it very easily and the teeth pull it out.
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