Bringing trailers back to life

It looks mechanically good. I run it as is and keep the money.

 

I grew up near the cement belt in PA when you always knew the car of someone who lived near the mills because of the grey cast over the original color.

Years later I saw a driver upset because his new tractor had sat in Nazareth and was covered with cement dust. The mills used to open the dust collectors when it rained, you could see the cement falling with the rain in the street lights...

Vinegar [Acetic Acid] mixed with water cleaned his truck.

We used Muriatic acid [dilute hydrochloric] to clean the tractors at the cement terminal. turns chrome black...

You should have luck with aluminum brightener if it is an aluminum tank.

 

Vinegar...and lots of elbow grease.

 

Even through the grime it looks to just be aluminum right? Acid is what you want but I'd be careful on using one that's not for Aluminum. I'd grab a gallon of Alumawash and drench it. It will take a couple times before you get it clean and get rid of the streaks but should look pretty descent. With descent soaking you may get a milky look but thats still way better than it is currently and easy to fix.

 

Aluminum Brightener is an acetic product made for aluminum