cleaning enclosed trailers

jhardesty

New member
I tried cleaning an enclosed trailer. It had black streaks running down the side from the top. I tried several different cleaners. I could not budge the streaks. I assumed the streaks had eat into the clearcoat and there was nothing I could do. Does anyone have any suggestions? I just started power washing this year and was considering fleet washing. Would tractor trailers be the same way? I appreciate all responses.
 
I did. Maybe I don't use the right chemicals for gutters. I have been using truck wash. A caustic degreaser. This seems to clean them really well. What do you recommend?
 
I am not familiar with you particular problem. But I have found that when using strong alkaline cleaners don't do the trick, try a two step process.

If your not familair with two step. Just apply a mild acid solution followed by an alkaline soap. Make sure the area is well ventilated. The acid fumes may be strong depending on what you use. We normally use an aluminuim brightner.

Good Luck
 
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