I have used the various tools such as illustrated above to bend both wire and strips into loops and all work very well. I currently have the bending pliers illustrated above. In addition, I have not felt the need to heat treat the brass before bending as the sizes and gauges I have used all bend easily using the tools. I also suggest you rummage around the jewelry making section of your craft store (I do so at Joann’s Fabric and Craft store while my spouse shops for quilting fabric). There are a lot of jewelry parts that can be used in ship modeling…loops, hooks, pins, etc. There is always an extensive supply of brass wire used in making jewelry in various colors and gauges available as well although I favor the black. Jewelry tools work very well in model shipbuilding. Pick and choose as you see what works. I also highly recommend this bending tool from Amazon.com. I have three sizes of this plier as well and to be honest they are my go to tool for looping wire or strips.
The Beadsmith Concave (Hollow)/Round Nose Piers – Wire Looping and Wire Bending Plier – 5 inches (127mm) – Steel Head & Double Leaf Springs – European Design & Quality – Tool for Jewelry Making