Clark when I turn a HF I turn it to finial size green or not. If I do get a crack I put some thin CA in the crack from end to end going past each end a ways. I then will sand enough to fill the crack and reapply thin CA. This will control the crack that has started. If it is a little on the wide side I will mix some 5 minute epoxy, get me some sanding dust from the piece or instant coffee and mix it in then fill the crack. This works rather well. HF's I don't soak in DNA as I said I take them from start to finish to about 3/8" and no more than 1/4" thick walls. As soon as it is done I soak it immediately in Minwax Antique Oil. I really slop the finish on to soak till it won't soak any more then let it stand for 10 minutes or so making sure you have no dry spots. I wipe off the excess after 10 minutes or so. If you make sure both surfaces are soaked and the finish is standing on the outside I haven't had a problem with cracking at all if it hasn't cracked on the lathe. I guess you could use Danish oil and do the same thing but this has been what has worked for me with fruit woods of cherry, walnut and apple.
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