Acid and Copper Solution. 1  1. Ensure that the metal you are working with will rust. 2  2. Measure some hydrochloric acid into a plastic bottle. 3  3. Dissolve a bit of copper in the hydrochloric acid.  4. Dilute the copper and acid solution with 1  water. 5. Clean your steel or iron thoroughly.  6. Apply the acid 1  solution. 7. Allow the metal to  rust.
Quick Answer. Depending on size, potatoes should bake in the oven for around 50 minutes to 1 hour. Flipping the potatoes every 20 minutes during the baking process helps to ensure consistent baking throughout the entire potato. Continue Reading.
Baked potatoes in the microwave, 2-4 minutes per side, depending on the size of the potato and the strength of the microwave. How Long Does It Take To Grill Baked Potatoes. Baked potatoes in foil, 45 minutes on the grill. Baked potatoes that have been parboiled for 10 minutes, 5-10 minutes on the grill.hen it comes to baked potatoes, the cooking times vary dramatically, depending on which method youâre using. Here are answers to frequently asked questions about cooking times for baked potatoes. How Long To Bake A Potato. Bake a potato for 45 minutes, in the oven at 400Â°.