Been welding ever since I was big enough to hold a torch Dave. Like Bill, dad was a welder and taught me at a very young age. I also owned and ran a welding fabrication shop when I was younger. I was a lead instrument welder toward the end of my working career at a particle accelerator outside Chicago, so you see, I have a little experience with all phases of the trade. I agree with Bill also on the application, it's a zinc based rod that bonds to the surface just like solder does. There were always a few vendors up at the EAA convention in Oshkosh hawking this stuff. Their big trick was punching holes the size of your thumb in alum cans and filling them back in with the rod. It does work but temperature control is extremely critical and it takes a lot of practice, and I do mean a lot. I brought some home and tried it but never had much luck with it. Its fun to play around with so try some and let us know how you do.
Denny Graham
Sandwich, IL
