In the episode, 'What Digs Beneath' the scrap iron is probably the hardest to get. The cactus spine you get by buying the gloves in the store, the plutionium you talk to Luthor Bigbucks about and he says for 300 simoleons, he'll tell you where to find it and for the rubber waders talk to Pepper Pete. He'll say they built a factory on the river and then when you go behind it, digging with your shovel will give you the waders. And now for the scrap iron. This cheat is already on Cheating Dome but you can be tricked! After you do the Chop Shop game, the 'Strong Man' is Jimmy the Neck, but if you talk to Tank Grunt he says he will help you if you're friendly. If you complete a friendly conversation with him, you can lead him to the factory. BUT, when you show him the iron, he says something about it being illegal to ruin anything on private property and he leaves. It's a waste of time, so don'e get tricked!