I'm new on this forum, but I've made some decent molds out of Bondo! Take a soda can and cut the bottom off, deep enough for the sinker you want to duplicate. Coat the desired sinker with a touch of WD-40, or Vaseline...just a little...wipe it off so there is just a tiny amount on there. Fill the soda can with the prepared bondo (mixed with the hardener). Let it set a little bit, but not too long. If you mixed a lot of hardener in it, it will set very quickly. Put the coated sinker into the bondo and hold it in place until the bondo sets enough to hold it's shape (normally just a couple of minutes). When it will hold it's shape with the sinker removed, remove the sinker and allow the bondo to completely cure...depending on how thick, but overnight would be best. Then, either purchase some of the little brass eyelets or make some with copper wire, pour your lead into your new mold, and with a pair of needle nose pliers, hold the eyelet into the lead for a few seconds until the lead cools and hardens then pull the sinker out of the mold...and VIOLA...home made pyramid sinkers! You can make several molds this way, of varying weights.
Hope this helps!
