build a knife vise like this one- its a modified Loveless knife vise I believe...
This vise holds the knife by the wrapped blade, protecting it from slips and gaffs. The biggest thing I have learned is not to be impatient. You cannot put material back on once removed. Be slow and deliberate.
I used to have a ton of material to remove after I applied my scales.
I now remove a huge amount of material from the back side of the scale, so when the epoxy is dry I have very little to do to the outside. Just a little shaping with my grinder, then 220 up to 800 paper and then its on to the buffer.