1. Fumes: When you paint an oven, the fumes from the paint can be harmful if they are not properly ventilated. These fumes can include volatile organic compounds (VOCs) which can cause respiratory problems, headaches and other health issues.
2. Fire Hazard: The paint used on the interior of an oven can be flammable and could pose a fire risk if it is ignited. This is especially true if the oven is not properly ventilated and the fumes from the paint are allowed to build up.
3. Uneven Heating: The paint on the interior of an oven can cause uneven heating, which can affect the performance of the oven and lead to unevenly cooked food. This is especially true if the paint is not applied evenly or if it is applied too thickly.
4. Warranty Issues: Painting the interior of an oven can void the manufacturer's warranty, so it is important to check the warranty before making any modifications.
If the bottom of your oven is scratched and rusting, you can try to clean it using a mild detergent and a non-abrasive scrub brush. If the rust is stubborn, you can use a commercial oven cleaner according to the manufacturer's instructions. You can also try using a baking soda and water paste to clean the rust. To make the paste, mix equal parts of baking soda and water until you have a thick paste. Apply the paste to the rusted areas and let it sit for several hours before scrubbing it off.
If the rust is still visible after cleaning, you may need to have the oven professionally repaired or replaced.