I was wanting to see if anyone is running a 187 or any MIG with a plastic liner doing aluminum? I have a oil pan about 1/4 inch thats cracked and i need to weld it. I dont have a TIG or know anyone with a TIG so i was going to use my 187. I know you can do it but i just wanted to know if you can get good results. Im sure ill have to preheat it alittle with it being 1/4 cast aluminum. Post some pics!