Make sure you have all the loose rust and dirt out of the frame first. I used a combination of compressed air, my shop vac, and a good telescoping magnet. It is actually a pick up tool. I used 2 cans of the Eastwood product per side of frame. Make sure you put some newspaper or rags underneath the frame, you will have some drips if you are putting the product in thick enough. I loved the product. It was easy to use with the long nozzle and 360 degree head.