I know nothing about the kits but if you're going to make your old molds out of plaster of Paris you To seal them Lotta guys use Elmer's glue glitter you could use crap later but make sure it's not mentality or metal in it and make sure that it can take the heat you can go to quite a few places and by the glitter already made for plastic I wouldn't waste my time trying to make molds I would go to lure craft take a look at their website they have a lot of molds already made and you can buy the greater their the colors and everything else that you are wanting to get started also they have injection molds the injectors and everything for that also there are quite a few more makers out there you want further information send me a PM