I use thin CA on the blank when I have drilled it out, from both sides, internal and external.
If the hole fills up then re drill it out again..
I then turn it but leave a few mm on and not to finished size. Re CA it off the mandrel and then re mount and finish..
Not that it's the easiest way but find it works best.. Have tried some cuprinol wood harder recently. Jury is out at moment but seems ok..