Originally Posted by OaklandStrom
You can weld aluminum with oxy-hydrogen or oxy-acetelyne, but hydrogen is a bit easier. To weld aluminum, you need to visit https://www.tinmantech.com/
and buy Kent's flux. It's the best flux available, and works quite well. Evan claims it's a recipe Kent found in an old Navy repair manual. Unfortunately, the flux puts off an orange flare, and you also need to buy Kent's TM2000 blue lens to weld with - and it costs $200. With a regular 3 or 5 shade lens, all you see is a white ball.
Not suggesting that Kent's stuff isn't the best, but Ron Fournier's
works and is a lot more reasonably priced.
An alternative to using 1100 would be to use thin strips sheared from your base 3003 as filler rod.