I had a small piece left over from my last turning of acrylic and decided to experiment with JB Weld.  I drilled some holes in the piece that had a lot of chip outs and small holes. I did not make much effort to make sure holes were filled. When I turned it, it seemed softer than the acrylic and turned easily. No problems and it held in place really well. The trimmings were slightly magnetic, but you could easily blow them off a magnet. It did not polish like the acrylic and I did not use a finish as I sometimes do. I will use it again, probably as feature within the piece.

 It also help a lot if your project is nearly the same color as JB Weld

Great idea

WOW!

Could you color it while you're mixing it?

I doubt you could get much color, except darker gray to black. I have seen epoxy that you can color, never used it.  One thing that I did notice was that it did NOT get soft as I turned, the way epoxy will

Well, black is good.

I use epoxy for filling defects in wood, mesquite mostly. Black or red is all I use. Have never experienced softening. But, I don't turn. 

Good idea. It reminds me of what a lot of guys are doing with milliput  epoxy putty.

 

Steve

I have used a couple brands of epoxy. Right now it is RC Model epoxy and I have colored it with no problem . Have used liquid shoe polish and some transtint colors. Will have to try the Chestnut stains I use now for that.

I used that scrap piece with the JB and turned a small ball. It came out great. I used plastic polish to get a  high luster.  I turned down another piece and it had voids in it. I filled with JB and allowing it to cure. If it works as I think it will, I'll post a picture