I've tried many amber FOs and none of them do it quick right. I want to buy fossilized amber oil for perfuming purposes, at the cost I don't think I'd use it in soap... maybe. I know the scent would be much different since they aren't the same beast. That said, infusing amber resin is easy. Grate resin, add to oil, place in hot water bath for a few hours, let cool and strain before use. I add more oil to the resin left behind after straining to make a new infusion. You can "reuse" it a few times.