Then, bend each length into an individual circle. Screw four metal brackets into your workbench to hold the size of hoop you want to weld. Weld together the two ends of the hoop using the Dremel Versaflame. In order to do this, first, clean up the faces using your Dremel 3000 with a Dremel stainless steel wire brush 530 to remove oxidization, dust etc. Then, heat each of the two ends of the hoop to melting point using your Dremel Versaflame. Lay a bead of the welding rod onto each face of the hoop. When the end of the hoop is hot enough, the welding rod will melt onto the end of the hoop.
Then, while the bead of welding rod is still molten, abrade through the molten welding rod with a stainless steel abrading rod to break through the oxidation formed underneath the molten bead of weld rod. This ensures that the bead of welding rod merges with the aluminium. Close up the hoop, and clamp in position using a Dremel bar clamp or similar, then heat up until it reaches the welding rod’s melting point again and the two mating faces will fuse together. If necessary add more welding rod. There are some good tutorials on YouTube to help you do this.