Hello all....I am still plugin away even with the snow and cold temps grills to pay the bills! Quick question. I am working on an ole silver B with the original cast iron grates...the heavy ones. The coating is gone and they have a little rust but not bad at all. I have some extra propane tanks right now so I dont mind hooking my customer up by reseasoning his grates and saving him some money. So I am looking to clean first then encapsulate the iron in that awesome black candy coating. I have experimented over the years but I mostly just use whatever the wife has in the pantry for cooking on the grill or for a quick freshin up of some grates. I have heard of grape seed oil and linseed oil but have never used either. My Mom cooked w Crisco back in the day, I wonder if that would be good. I understand it has to do with smokepoint but I am sure you guys have already broken the code. So please tell me what the magic potion is........thanks in advance.