1) Every Palm wax that I have used, does crystalize. 2)MP is around 135, heat to 180 add scents/color, pour around 150 into ALUMINUM molds - heated to 140. If you don't use the aluminum molds you get a much smaller crysatlization look. 3)Yes 4)Not that I have a seen, but I only use aluminum molds. 5)I think Issaquah Candle Supply will ship to PO boxes since he will ship via USPS parcel post. I get all my wax from him, but I pick it up. I can tell you that right now I am using Astorlite F & PQ, but I am only going to work with the F as the new PQ is not working for me, though I loved it before the palm wax was changed.