Not the gels. The cheap old white stuff that’s been around for years. Take a soft cloth like an old T-Shirt and put some toothpaste on it and start rubbing in a circular motion. It may take a while but you should be able to buff the plastic area smooth if it’s not etched too deeply. If it doesn’t return to a full shine clean it to remove any trace of the toothpaste and look around for some Johnson’s Wax Pledge with Future Shine in the floor care area. It’s a clear acrylic floor coating. Pour some on a rag and rub it into the plastic. It should return the area to a nice shiny condition. The Future isn’t permanent but having to wax the microwave every couple of weeks isn’t so bad.