I'm testing a silicone mold and am getting the same results - everyone raves about not having to line the mold, but all the pockmarks drive me crazy.
I don't put anything on the mold. I've tried changing the lye:water ratio, gel or no gel, CPOP or wrap in towels or just leaving it out in the open to cool... always get the marks. Maybe it's my oil mix? I'm using OO/PO/CO/Castor at 40/30/25/5, with a 5% discount. If anyone has a definitive answer, I'd be very happy to hear it...