Originally Posted by Skyking
I little tip I picked up years ago was to save the filings, and bits of metal kicked out when filing or drilling any type of metal. You can also cut up some steel wool with scissors into little small bits. When I mix up my JB Weld, I add some of this mix into it to strengthen the mix. About one third to one half of the total volume. It makes for a very solid repair, that can still be smoothed, drilled, or even drill and tap it. I've only ever used it with JB, but I imagine that it'll probably work with any epoxy compound.
I like your tip and will try it. For one it will stretch out the JBWeld which is not inexpensive (and is the best of the ones I've tried through the years) and two, it should indeed give some additional strength just as adding stone rubble to cement.