Don't waste your money. Lightly sand the frame, spray on some good primer and top coat it with a quality spray enamel that you can touch up as needed. I used Rust-O-Leum. Looks great, dries hard, dirt and dust doesn't stick to it like it can to undercoat. It's all about $$$$ for the dealer. If they aren't making enough on the trailer itself they should raise the price not try to fleece you on a bunch of add-on junk. JMHO...Don