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55 gallon drum and Avgas storage

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AvFlyGuy

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I picked up several 55 gal oil drums to store Avgas in them. I can get a huge savings when a fuel truck delivers in bulk to many others that have 500+ gal steel tanks. Last truck load of 6000 gallons 100LL delivered to several other guys big tanks was only $3.05/gal. I took 220 gallons. Airport pump price is $5.09/gal.

Three barrels are spotless inside - no rust or anything. The other has some rust on the inside which has been sanded off, but it still forms a thin layer or rust residue in places. I am a little concerned about contamination. I have a 12 volt gasoline pump with an attached filter.

Question is... is there any kind of paint or epoxy that I can coat the inside of that barrel that is 100% resistant to 100LL Avgas? I know regular car gas would likely hold up to some sort of Rustoleum paint, but Avgas is a different beast.

I am using this filter from the pump, through the filter to the Cub gas tank.

https://www.northerntool.com/shop/tools/product_910810_910810


Think I'm OK with just this filter or is there a product I can use to coat/paint the inside of this one barrel that is showing small rust haze on the inside?
 

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