Since I had about a quart of Rebound 25 mold rubber left over I decided to use it to make another rubber positive in a small mold, so after brushing on some of the release on another old Polytek mold I brushed the first application and then poured the rest in the mold. Now 6 hours later it’s cured so I pulled it out and it had cast perfectly with no defects and just as smooth as the original.

So the surface defects with the Econ 40 were the fault of the Econ 40 not the release or the Polytek mold.
Think tomorrow I’ll make a plaster piece mold of this Art Deco piece.