bwFX42006

I've got a 2006 FX4 with about 76,000 miles on it and the frame is starting to rust. Not terrible rust, but enough to annoy me. I was thinking about going through the frame this summer and grinding off all the rust and priming and painting the bad spots. Then i was going to have the whole underside of the truck undercoated before winter. If the frame has already started to rust is there no point in doing all this work? Or if i prime and paint everything will the undercoat be beneficial? decisions....decisions....

Firefighter83

There is rust converter spray that I know some people will say doesn't work but I did it before winter and the frame looks like it made it through with out getting worse. Its easy to do also and turns black after it drys so no need to paint the frame after.

pete7996

Ive been battling it with mine too. I live in upstate NY and salt just eats everything around here. I use a wire brush,and power washer every spring, then rust inhibiter. and a good quality undercoat over it. I just had all 4 door jams repainted because they started to get a little rust along the edges. Its a loosing battle around here but you have to do what you can to slow it down. Best thing I can say is wash it at least once a week during the winter. I have a car wash pass I buy every winter its good for unlimited washes for 24 bucks a month. worth every penny.

bwFX42006

Yeah I also live in upstate NY and the salt around here is ridiculous. There's no way to keep anything looking nice around here.

PJB

Its probably just surface rust and really not a big deal