The Dremel isn't the best choice for this task. Trust me, I have a Dremel but it doesn't gest used to make knife scales. Here is what works best for me:
- make sure you have a vise, a hacksaw, a flat file, a semi round file, sandpaper, handdrill, right size fresh drill bit.
- if you start with horn or wood block, fix is in a vise and cut slabs out of it with a hacksaw. If you don't go too fast, the resulting scales will be surprisingly flat
- draw the outline in the wood/horn/stag/micarta ...
- cut the rough shape with the hacksaw
- mark the pin holes and drill them at slow or medium speed
- put some rough sandpaper on a flat surface (like the bench) and rub the scales against it until they are truly flat
- put some temporary pins into the holes and clamp the scales together in the vise
- work out the front area with files and sandpaper (from 280 to as fine as you wish); do a good job, finishing this area after the scales are glued to the blade is not an option
- remove the pins, put the scales on the blade, put the temporary pins on and to the vise we go again
- file the outline until you get to the steel; attack this part at an angle so when you get to the steel you don't scratch it badly with the file, if you see what I mean
- when it looks fine, take the scales off, clean everything, make the final pins, notch them along to get a good grip from the glue, mix the epoxy and glue everything on. Don't use as much epoxy you might think you need, it will be squeezed out to make a mess only
- put the blade in the vise, be carefull not to epoxy the jaws!
- after a few minutes (10-20) the epoxy starts to be kinda solid and you can clean the big mess with a blade (I use a bronze one since it's soft and doesn't scratch); use some acetone to clean the small mess
- put back the knife in the vise for a day
- when it's dry, file the extra pin material, protect the blade, clamp it in the vise and cut stripes of sandpaper, again from 280 to very fine
- finish the handle using a "shoeshine" motion or whatever works out for you.
- at the end, if the steel on the handle area doesn't have the same finish as on the spine of the blade, make a dremel-sized roll from the finest sandpaper you have + superglue (use the loosen dremel sand barrel as as guide and make sure you glue it in the right direction so it doesn't ripp off because of the rotation...), put it on the dremel, go at 12000RPM and finish the spine and all with a light touch. Make sure not to mess the handle.
I hope it helps. It sounds like a lot, but it takes only a few hours if you are carefull and don't mess up and start over and over
