Cooks Great Will Look Terrible

Received this as a gift in the winter packed it away till this summer.
August we set it up while on vacation and it did a great job cooking burgers, steaks and whatever else we could get on the large grill with a built in electric starter, nice even heat front to back and left to right.The design is good as far as usage from the way it folds up and locks the cover shut with a great carrying handle to the way it unfolds for a quick and easy start up.The stainless steel exterior was beautiful when it came out of the box but after three hours it turned black brown from the heat and unable to get it clean back to the stainless steel look.