FishingDog if your having problems with the lead flow you may need some softer lead as it will pour smoother for you.Pre heat your mold will also help to fill them smoother.As for slag or flash check your mold for anything that may have gotten in it,even the smallest of particals like lead will not let it close completly.Also the hooks your using make sure they are letting the mold close tight.As for the parifin it is to help with slag build up on the lead pot.Hope this will help ya a little.