Aluminum trailers traditionally hold their value longer and, with just minimum maintenance, are far less likely to rust and corrode. Plus, most trailer owners report that aluminum trailers pull much easier. However, if you choose to purchase an aluminum trailer, make sure that's what you're actually getting. Many companies producing "aluminum" trailers are in fact only wrapping the frame in aluminum sheeting. Unfortunately, beneath the sheeting on these so-called "aluminum" trailers is a heavy steel frame. Steel will rust if exposed to the elements. Even if it is painted or coated, rocks, debris and the constant flex of the trailer as it travels can peel or chip the coating and allow moisture to do its dirty work.