I'd zap the tops with a heat gun to remelt the top layer, that should take care of it. I use 444 and 99% of the time I have to use the heat gun because of craters and such. I don't bother with the box or other cooling interventions anymore, then again I don't color unless it's requested. I will say I have much less problems with craters and tops with wide mouth jars. Soy is never going to look perfect consistently, it's in it's nature to look "natural." Don't let it bother you! I've never had a customer complain that their candle top wasn't smooth after they burned it.