Hey TU Members, it's been a while since I last posted, but am just starting to get back into tackle making. Today, I started to attempt to make a master of my favorite mold by pouring wax into it to get a master. Well it wouldn't release so in fear of breaking the mold I heat the wax to melt it out. In doing so the mold half developed a few heat stress cracks. The mold is still whole, but I don't trust pouring in it, and don't want to risk losing it.
My question is how should I go about making a master. The mold is made from some form of plaster, either POP, durham's or something similar, and sealed with envirotex lite. Would the safest route be to make a box around each half of the mold with acrylic, then pour rtv to get a negative of each mold half. Then I can pour RTV or POP over the RTV negatives to get something similar to the original mold. Would this work?