That is correct, soaking them in Westly's Bleach White removes any mold release. If you were to paint the parts and they did have mold release on them, it would be bad! ONLY use Westly's Bleach White! The Purple Power cleaners can actually saturate the resin and ruin it! Be sure to soak the part BEFORE you do any sanding as the mold release can be pushed down into the resin if you sand over it and cause paint problems later on. Be sure to wash the parts with warm water and dish soap after they have soaked in the Westly's. When you glue the parts together, it helps to rough up the areas that touch. It gives the glue something to bite into. Only use super glue or Epoxy for glueing resin to resin or resin to plastic.