I bought a cooker at a church auction. It was made from a large propane tank. After cooking on it several times I have come to notice several small items that are giving me some concern. One of them being a faulty weld. I see a slightly larger than pinhole sized hole at one of the seams. I suspect there may be more but I haven't taken the time to look for any more. My question is, Can I plug the pinholes with something like JBWELD? I have used the product on other things before and it held up really well but it wasn't exposed to the kind of heat that would be in a smoker. The hole is where the firebox is attached to the cooking chamber.