Yes,,
Our type dirt will leave a yellow tint on the paint if not gotten off in 3 or 4 weeks.This truck had a bad yellow tint on the paint it hadn't been washed in 2 months (bad weather).I have more tomorrow that are just as bad,if I can I'll take a picture of the yellow tint.
Ron,all I did was make a fast rinse to get the mud off,I applied acid and washed with hot upstream soap,the truck was as clean as you see it,only thing they was still a yellow tint on the paint after washing it.To get the yellow tint off after washing it I turn the downstreamer on while still having hot upstream soap and apply it to the yellow tint or just where the yellow tint is,alot of it will come off with the first whashing but not all.
Jennie some of those feed trucks smell good,like coco puffs hummm.