This page will show how I use a wonderful product call JB Kwik Weld. It is an epoxy steel that is mixed from two parts to form a hard substance that can be sanded, machined, and painted. It sets up in 5 minutes and cures in 24 hours.

I mix it together on a small pad of Post-It Notes so I can just peel and throw away when it is too hard to use.  This is seen on the 22g Streamlined Tourer I got as a badly damaged casting. The rear end was in pieces which I tacked into place with superglue, the front end was missing the entire lower section, the front axle supports were completely gone, and the rear axle supports were damaged. There was general metal fatigue throughout the model.

I build it up in successive layers and allow it to harden until I get enough hardened product to machine down to the shape I need. I also fill in the fatigue cracks as needed with the liquid before it hardens.

Once the product is hardened and cured, usually the next day, I can machine it down with my Dremel tool, and sandpaper in order to configure it to the right shape.

I can then fit the wheel and axles ready to install, and paint the toy. Here is a picture of the finished product after all the sanding and smoothing is done and the toy is painted.