My dump trailer is about 5 years old and the bed is missing the majority of the powder coat from halfway back. It rusts if it sits with water in it but then it gets used again and cleans out all that brown surface rust development. The sheet now has minor deformations in it from heavy loads and whatnot. But it hasn't lost any strength of the floor from what I can tell. My biggest concern is sitting in the winter. Usually where I store it is already on a downward angle so I just crank up the jack to increase it to let water flow out. I think for winter this year I will shoot the bed with fluid film as it does a good job on other things. There was someone on here, maybe perfectearth, who had his bed repainted professionally. He knew it was just going to get worn off but decided to do so anyways.