Hello Rick - I had considered the POR-15 lier option but thought I could get away without using a tank liner.  I've used POR products before, and I think they are worthwhile.  Might have to get another order ready here soon.  Thanks,

Kyle

> 
> Kyle,
> 
> I recommend a product called POR-15 that is a sealer marketed for just what
> you're wanting to do.  I have a gas tank sealer kit waiting on me to find
> time to tinker with it.
> 
> Do a Google search for it and see what you think.
> 
> Rick Weaver
> Memphis, TN
> 
> -----Original Message-----
> From: at-bounces@lists.antique-tractor.com
> [mailto:at-bounces@lists.antique-tractor.com] On Behalf Of Kyle Sands
> Sent: Friday, July 15, 2005 10:50 PM
> To: antique-johndeere@lists.antique-tractor.com;
> at@lists.antique-tractor.com
> Subject: [AT] Phosporic acid and cleaning a gas tank
> 
> I would never have imagined it would be so difficult to find phosphoric
> acid.  I called all over town asking for it by name and also under names
> such as ospho, metal prep, or metal etch.  Nobody had anything, but more
> likely, I don't think anybody had a clue what I was aksing for...
> 
> In desparation, I went to a fleet store and looked through all their
> cleaning products to see what I could find.  I finally found a product
> called rust destroyer or something like that and it listed the active
> ingredient as phosphoric acid.  It cost my 8 bucks for 32 oz. but I didn't
> care.
> 
> I had cleaned out my gas tank using muriatic acid to eat away all (or at
> least most) of the rust inside.  I then washed that solution out with a lot
> of water and poured in this rust destroyer stuff.  I sloshed it around, let
> it sit, sloshed it around again, let it sit, and did that several times
> leaving it in overnight.  I poured it out the next day figuring my tank was
> ready - sealed and protected from future rust.
> 
> Wrong!  I opened it up a couple days later and rust is starting to form on
> the walls and on the little metal dipstick.  What's going on?  I thought
> phosphoric acid was supposed to coat the metal with a protective coating??
> Am I wrong, or did I mess up somewhere?????
> 
> Kyle Sands <>< Alexandria, MN
> 
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