Hey Pete, i didn't have much luck with that stuff. Didn't spend enough time with it. But i have talked to a few people that have used it successfully. It works more like solder than "welding" make sure you clean the area very well, a stainless steel toothbrush is the recommended cleaning tool. Don't melt the substrate metal you just want to get it hot enough for the rod to flow. Aluminum doesn't change color as it heats up the way steel does, it goes from being satin looking to being shiny and then turns into a puddle on your workbench. It just takes practice to get it. From what i have been told it also looks better than TIG welding for some of the lesser quality metals, but if you need strength have it TIG welded. Let us know how you do.