We recently had a local radiator repair shop clean the rust from an older used gas tank. They submerged it in a cleaning acid tank overnight. The price was $65.00. WOW! Several months later we discovered an “old school” method that would have cost about $1.00. Oh well, we live and learn.
Back in the days of the Great Depression money was a scarce commodity and economical methods in life were used or otherwise things probably did not get done. It was discovered that agricultural molasses (not what you buy in the grocery store) mixed with four parts water removed rust. Fill your tank with this combination and wait about a week. Surprise! Your gas tank is shiny clean inside.
You can even put a lid on a five gallon bucket from a hardware store and small parts covered with this formula will have all the rust removed in less than a week.
Agricultural molasses is used to mix with livestock feed. It causes farm animals to eat otherwise less desirable feeds because of its attractive sweet taste.
Retail price at a livestock feed store is about $2.00 for 10 pounds.
This data is provided by MIKE RUSSELL of COLUMBIA, MISSOURI.
Another cleaning Technique!
Several years ago, we heard of a gas tank cleaning method that cleans most tanks every time and its FREE!
Attach the gas tank to a farm tractor large rear wheel before a day in the field. Add about a pint of ¼” gravel. The slow rotation of the large wheel will move the gravel continually inside the old tank. Sometimes even by noon, the rust is all removed as the gravel continually moves inside the tanks. Just pour out all contents and the tank is cleaned!