Jeff, we cleaned out a 20-gallon aluminum
tank (thought it was stainless, but white residue in some spots outside said "aluminum oxide" to me) last year. No one would pressure wash it, afraid of EPA problems from the residual fuel
. We used liquid Tide (which is fine stuff, even removes old Cosmoline) and hot water
. Turned out there was very little "crud" in the tank but now we KNOW there is none.
A geology prof taught me that if you need to scrub out crud, a good way is to use a box of coarse koshering salt
or de-icing salt
. It is sharp and abrasive, dissolves slowly in water
, doesn't dissolve in fuel
, so you can shake it around in the tank with some FUEL and it will act as an abrasive. Then, a water-wash dissolves it all and ensures there is no abrasive left in the tank. Neat trick!
All the slops went in the "waste oil" collection bin, that gets recycled anyway, water and all.
Like most boat projects the CLEANING
was the easy part. Hauling the tank out and replacing it...each twice as long.<G>