If the rust spots are evenly spaced, you can use surface stitches to cover them. Good stitches might be Smyrna cross stitch, satin-stitch heart, queen stitch, satin stitch lozenges/triangles, palestrina knots, etc. If the spots are not evenly spaced, balance the design by adding extra stitches between the spots.
Fortunately, most states require drivers to equip their trailers with brakes and devices known as brake controllers. When a driver presses on the brake pedal in his truck, the brake controller lets the trailer's brake system know how much braking power is needed to stop the trailer.
Hand Controls Gas & Brake Aids. Limited mobility doesn't have to keep you from the driver's seat. Mobility products like hand controls that let you gas and brake can put you there. In place of the usual gas and brake pedals, hand controls allow you to control speed with a lever which is typically mounted below the steering wheel.