I need a cauldron for a Halloween prop, but wasn't in the plastic ones you can pick up anywhere during Halloween season. I looked around for a real cast iron one, none locally I could find, and the ones I did find online were terribly expensive, not to mention the cost of shipping. So one day on pintrest ( I really get a lot of inspiration there) I saw where a guy had altered a plastic cauldron which looked fairly real. I decided to give it a whirl. (his was way more elaborate with a stand and everything) I tracked back to the original post to find out how he did it and was surprised. He used a mixture of oatmeal, sand, glue and water. Really, oatmeal? but it does give that flaky texture of rust. I mixed some up, of course mine was alittle watery, so went outside and got just plain dirt, mixed alittle of flour for good measure. (I really felt like I was cooking up some weird potion) and slapped it on. It still was a little runny as you can tell, it dripped down the sides, but it stuck. I let it thoughly dry and then sprayed a flat black primer all over. I then painted some rusty stains using acrylic paint, and ta-da, a old rusty cauldron! It will be a perfect prop for what I needed it for.