they did a bad job coating the frame and a bad job welding. clean them with a wire brush and some thinner or acetone and paint with the undercoat from rustoleum works great and you can get it from home depot for about 6 bucks a can. i keep a can in my garage along with a can of their bed liner coating too. works great for bumper and skid plate scratchesshould there be rust on my frame welds already...maybe 2 years old...salty roads in winter.