Lets see, this should be great to fix the rust in tank.

[syafi]

Coca Cola, fix & remove rust in bolts, nuts, rims etc just by pouring it in the rusted area .......

so I guess it should work as good to fix the fust in our fuel tank.

correct me if i am wrong.

[jtcrespo]

I'm afraid to put gummy sugar water into my tank.

MEK and POR-15 worked great for me.

You'll need to clean the inside of the tank really well after pouring coke into it, so might as well use the MEK instead as it evaporates quickly. Use small bolts and nuts rolled inside the tank to dislodge any stubborn rust. Then the interior of the tank will need a new coating of POR-15 very quickly as a tank can rust again overnight.

[DaveDanger]

I finished cleaning, de-rusting and sealing my tank with POR-15 within the last week. I HIGHLY rcommend it. An additional tip that I provide free of charge is to have a couple of high wattage (500 watt) shop lights on hand to heat the tank with between steps. It is very true that a freshly cleaned and derusted tank can rust overnight. As I flushed the interior of my tank each step of the way, I would vacuum it as dry as possible with a shop vac, then prop it up on its side and place my shop lights directly against the bottom of the tank surface (inside the "tunnel") to provide heat. I would reposition the tank every 30 minutes or so to make sure the heat was soaking all surfaces. The heat will absolutely dry the moisture out from inside the tank and prevent it from causing new rust. If a heat source such as this is not available, then do the shop-vac routine as thoroughly as possible and always place the tank upside down whele you're not actively working with it. A customer of mine, a retired Harley-Davidson dealer stopped in my shop when I first started on mine and mentioned this trick to me. It may not be possible to remove every drop of water from the tank, but at the very least, you don't want it to sit and begin forming rust down in the bottom seams if you can prevent it.

[mixongw]

My tank is a mess inside. The PO must have used a coating on it at some point. Now there is rust coming off in sheets. It's flexible, like rubber or plastic. Any suggestions as to how to get that crap out?

[FTGRET]

Try having a radiator shop boil it out.

[DaveDanger]

mixongw, google por-15 and take a look at their site. They can provide an extra stripper with their sealer kit that will soften and remove an old sealer. por-strip I believe it's called.

[JayH]

My tank is a mess inside. The PO must have used a coating on it at some point. Now there is rust coming off in sheets. It's flexible, like rubber or plastic. Any suggestions as to how to get that crap out?

If it is coming off in sheets more that likely the PO tried to Kreem the tank and now the Kreem is peeling off. More than likely the tank wasn't prepped properly. You might have to take it to a radiator shop to get all of the Kreem and rust out of it. Good luck and let us know how your tank turns out.

[retrex]

Stripping the inside of the tank.

My tank is a mess inside. The PO must have used a coating on it at some point. Now there is rust coming off in sheets. It's flexible, like rubber or plastic. Any suggestions as to how to get that crap out?

If the stuff is that Kreem crap, sounds like it, don't bother with the POR 15 stripper. It's doesn't work that well. Go to the auto store and buy a gallon can of Carb Dip stuff. Chem Dip is the name brand I think. Clean your carbs and everything else you can think of and use the used remains. I used some old dirtly stuff that I had used for years after the POR stuff fell short. It worked like a charm. Use nuts and bolts in the tank along with the carb dip stuff and you should get every last bit out. Swish around in a sealed tank over night. Finish it off with the POR store tank sealer kit. I know that this works because I have had it in a tank for 20+ years and it still looks good.

[Cracker]

I've always heard such good things about the Por-15 but I used it on my truck frame (following the directions to a tee) and it sucks! There was rust on the frame after less than a year.

[retrex]

POR15 clarification

I've always heard such good things about the Por-15 but I used it on my truck frame (following the directions to a tee) and it sucks! There was rust on the frame after less than a year.

We are talking two different products. One is POR15 the rust encapsulator and the other is a tank sealer. I think that it is called US General Tank Sealer. I have used both and both work well. I recently have done a gas tank with the encapsulator on the outside, and the tank sealer on the inside. No rust or pealing after one year. Will update on a yearly basis.