Re: Possible to "re-tip" sable brushes?
I have made my own brushes...out of various hairs. Unfortunately it is the individual hairs that no longer have their tips. The value of sable is that each hair comes from a belly to a needle point.
Cutting them off and arranging them into a new brush head will most likley not give you back the pointing capability. Also, half of the hair is in the ferrule, so you'll end up with a short brush.
I would use them for what they are, wash brushes.
DO NOT TRIM THEM...it damages the hair and the shape will suffer even more.
If you tend to scrub when painting then I would recomend squirrel or synthetic brushes. Squirrel hair is very fine and with a little patience the point will go EXACTLY where you want it. I am always suprised to find a mop pointing and following the line I have it paint. It requires a lighter touch, and some getting used to (a lot less time than you'd think)...an flow with it.
Winsor newtons have a good squirrel mop to try...go larger rather than small...a good #5 will be able to do all the details with exception of the eyelashes. BTW squirrel dagger brushes are what the use to pinstripe automobils.
Synthetics are also good...but scrubbing will dull them as well...so far the only brushes who's tip lasts are squirrels, black velvets, cosmo spin quills...but don't needle point.
Create like the wind!