These trucks are like 7000-9000lbs, when they come down on a rock you want that skid plate to hold up to that weight and force. You want thick steel or very thick aluminum. The benefit of aluminum is it’s a bit lighter weight…which is pretty irrelevant on an 8000lb truck
There’s no way I could “hammer out” a dent on any of the steel skid plates on my PW, it’s all 3/16”-1/4” steel. Even the stock skids, with the exception of the bars—maybe, are going to laugh at the idea of being reshaped with a hammer.