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Gas tank

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Michael D

Member
How can I clean the inside of my tank. The inside look's like when you take a propane torch to painted wood siding. I don't know what it is. Years of varnish, An attempt at a liner, not sure! I found a place on the internet that I could send it to that will sand blast and coat the inside with an epoxy, but I am not sure I want to do that. Thank's.
 
Muratic acid. Do a search for tips from others.
The acid (diluted) will clean to bare metal; have hot water available to rinse and air pressure to blow dry. Plug the outlet and add fuel oil or diesel fuel and slosh around to coat the interior for rust prevention. (rusting will occur rapidly)
The residue is nasty so have a plan for disposal of the dirty liquid.
 
Probably the easiest method is to use a kit like what Old has referred to. However if you choose to do it yourself, there are 3 steps to clean it out before you put epoxy liner in it.

1.) remove all sediment, loose rust, dirt, etc. This can be done a number of ways using drywall screws or similar. place screws in tank and shake it around to loosen old rust and scale. Use compressed air or vacuum to get all of the loose residue out. I prefer a vacuum.
2.)remove old fuel residue. This requires either a solvent like Acetone or a base like Lye or oven cleaner. rinse thoroughly.
3.) remove rust. Muriatic acid is a good choice. Phosphoric acid (naval jelly) is another. rinse thoroughly, and use baking soda or similar to neutralize the acid.

Dry thoroughly, and do one last rinse with Acetone. air dry. Rather involved for some people, but I have had excellent success with this process.

Now you can apply the liner. While this is a rather involved process, it will ensure a clean surface for the liner to adhere to.
 
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