i am going to create some small metal "sculptures" (desktop size) using old found items (nails, small metal pieces, etc.), all of which are rusted as a result of exposure to the elements. i want to be able to connect the various pieces together as a form of artistic expression. in that they are generally small items, i felt that soldering them would be the best form of adhesion but the solder i have tried does not seem to bind the pieces together. any thoughts/ ideas?