De-rusting process order?

Hey everyone, I know there is a ton of info on the wiki as to how to de rust the tank and I’m planning on using vinegar and salt. However my question is that because I also want to use por 15 sealant (I know I should maybe have used the whole por kit but that was about 90 quid over here) what is the best order to do the process? Do I wash the vinegar out before the sealant? The wiki suggests using fuel after vinegar or wd40? Anyone have experience of using por 15 after vinegar?

Cheers

Getting closer to having this bike going. Appreciate all the help I’ve had so far from here.

Stu

Re: De-rusting process order?

I hate to say it, but POR 15 is absolute junk. It will always fail at some point, and you will have to remove it all. I don’t usually coat my tanks, but when I do, it’s Caswell only.

Just remove the rust and fill it with premix.

Re: De-rusting process order?

Pushrod Fifty /

Dont put salt in your tank you will ruin it. Straight vinegar to the brim and pour it out halfway and shake with small driveway stones inside to wipe the crud off as it eats away. Do that every other day until it's clean.

I used the pink rust remover and that got rid alot of the slimey stuff.

Re: De-rusting process order?

Evaporust kicks ass. I bought a big 5 gallon bucket of it so I'd never have to buy any again. The only good tank sealer is Caswell as said before. Everything else fails

Re: De-rusting process order?

I agree with Nick. Evaporust or Metal Rescue.

Take a piece of bike chain about 8" long and put it in your tank and shake it up to remove all the loose chunks. (You can use rocks, or nuts and bolts, but a piece of chain is easy to get out)

Fill the tank with evaporust and let it sit for 24 hours (or more. It won't eat through metal.)

Pour the evaporust back into the jug and save it for later. It'll keep working until, well, until it doesn't anymore.

Then throw away the Por 15. Or return it. If you use it, you might as well throw away the tank. Same goes for Kreem. I've used them both. They absolutely suck and will cause nothing but problems. Google it and you'll see. I don't know how those companies stay in business.

Get Caswell. It's a clear epoxy sealant, it sticks to rust, covers holes and cracks, and NEVER comes off. It's beautiful. It's worth the money, and it just plain works.

I've done at least 20 tanks with it over ten + years and have never once had a tank leak or had the Caswell separate from the tank.

Re: De-rusting process order?

I've had great success with Red Kote, but must agreed with the chorus that POR15 was a spectacular failure.

Re: De-rusting process order?

I've fought with the rusty fuel tank of my beloved 1964 Ford Econoline van since I bought it in 1981. Epoxy patches, more epoxy patches, soldering with a torch (not altogether recommended) and finally Kreem. It worked for about ten years and then began leaking. So, having read about motorboat fuel tanks, I layered the bottom with fiberglass, which held for another eight years or so. The latest and greatest--and quite successful--is Red Kote. Funny story: I used gallons of acetone to remove the Kreem and thought I was done. So I poured in the Red Kote, sloshed it around, and poured out the excess for re-use, as is recommended by the manufacturer. Surprise: huge clots of the Kreem coating came out with it. So I strained the stuff through cheesecloth in a funnel and kept it. The tank remains leak-free after maybe five years. I'd recommend Red Kote.

One hint: ask an auto radiator shop if they do anything with gas tanks. Some do, and the fellow I talked to here in Tinytown recommended RedKote over any of the others; it can be removed if necessary.

Re: De-rusting process order?

> Mark Kinsler Wrote:

> -------------------------------------------------------

> RedKote

> over any of the others; it can be removed if necessary.

If you use Caswell's , it won't need removal . ;)

Re: De-rusting process order?

I like my POR15, I'm at 10 years on a Puch Maxi, 7 years on a Maxi, and 7 years on an MB5 tank all holding up great. I used the full kit and followed instructions to a T, was perfectly dry before I applied it.

Re: De-rusting process order?

> Travis Tutorial Wrote:

> -------------------------------------------------------

> I like my POR15, I'm at 10 years on a Puch Maxi, 7 years on a Maxi, and

> 7 years on an MB5 tank all holding up great. I used the full kit and

> followed instructions to a T, was perfectly dry before I applied it.

Sounds like you should be living off lottery winnings . ;)

Re: De-rusting process order?

My favorite method now is a quick rinse with somewhat diluted muriatic acid to get the heavy rust out. Rinse with water then an overnight soak with oxalic acid. It leaves what looks like a galvanized finish. No coating ever.

Re: De-rusting process order?

> P D Wrote:

> -------------------------------------------------------

> > Travis Tutorial Wrote:

>

> > -------------------------------------------------------

>

> > I like my POR15, I'm at 10 years on a Puch Maxi, 7 years on a Maxi,

> and

>

> > 7 years on an MB5 tank all holding up great. I used the full kit and

>

> > followed instructions to a T, was perfectly dry before I applied it.

>

> Sounds like you should be living off lottery winnings . ;)

For what it is worth, those were my early days of mopeds when I was way too focused on perfectionism. Only the MB5 tank had pinholes, all others could have been fixed with acid/baking soda/denatured alcohol. I haven't needed to use a sealer since, always the least abrasive method. Used salt & vinegar once with success too!

Re: De-rusting process order?

> Frank Bailey Wrote:

> -------------------------------------------------------

> My favorite method now is a quick rinse with somewhat diluted muriatic

> acid to get the heavy rust out. Rinse with water then an overnight soak

> with oxalic acid. It leaves what looks like a galvanized finish. No

> coating ever.

Oxalic acid does leave a coating after a water rinse . I've never treated the Simplex tank after the oxalic bath . Still seems fine . ;)

Re: De-rusting process order?

classic carl jepsen /

Listen I used to be an archeological conservator and materials scientists and later did modern materials and metals etc. for the Smithsonian's National Air and space Museum and other entities privately.So materials testing and simulation + analysis of all other material and environmental factors was my day job. [basically an expert in simple terms) ).At some time (time willing and permitting) I'll do a deep dive , or dig on some of the information / data and anecdotal evidence you have presented here.At some point it would be possible to carry out specific testing and to prove out (over time) this or that assertion under controlled experimental conditions if this is a distinct and real concern.I have shifted careers for about 30 years, and now I design three dimensional systems and software + optical systems.But I still keep an hand in the conservation and materials science front.

Re: De-rusting process order?

Terbo Speghetti /

> carl jepsen Wrote:

> -------------------------------------------------------

> Listen I used to be an archeological conservator and materials

> scientists and later did modern materials and metals etc. for the

> Smithsonian's National Air and space Museum and other entities

> privately.So materials testing and simulation + analysis of all other

> material and environmental factors was my day job. [basically an expert

> in simple terms) ).At some time (time willing and permitting) I'll do a

> deep dive , or dig on some of the information / data and anecdotal

> evidence you have presented here.At some point it would be possible to

> carry out specific testing and to prove out (over time) this or that

> assertion under controlled experimental conditions if this is a distinct

> and real concern.I have shifted careers for about 30 years, and now I

> design three dimensional systems and software + optical systems.But I

> still keep an hand in the conservation and materials science front.

Nobody wants to do this

Re: De-rusting process order?

You don't need science to tell you the material composition of some crap tank sealer that's broken loose and floating around in your tank clogging up your filter.

You could just read the ingredients while you're sitting in your garage pissed off because you not only wasted money and time, but now you have to do it all over again, only this time it's harder and takes longer, because it's not rust or pinholes, it's some Elmer's glue crap that only comes off when you don't want it to.

Re: De-rusting process order?

Pushrod Fifty /

I just sealed my Campus 50 tank with Caswell, it was so easy. It set up in about an hour. I have it sitting on an oil filled space heater with a piece of flashing under it. Because its clear, it was a little deceiving whether or not it was completely coated as some rust flash will look coated and bare gray metal will look like the Caswell never got to it but I could see later it was.

Re: De-rusting process order?

baird co

CHAIN!!!!

Lord man, and we've got a

Casino dealer for President.

Aces to you my freind?

The cure was in front of me the Whole time.

Horse's Ass I feel,.....YODA Voice🙂TU.

Re: De-rusting process order?

Yeah, i can't believe people are still using nuts and bolts or rocks or whatever, then spending an hour getting them all out. Even if the chain gets stuck, you can grab it with a spoke or something and pull it out.

Re: De-rusting process order?

Pushrod Fifty /

I brought a big bag of landscaping stones for $3.00 that I use in removable tanks, the stones are various sizes down to pea size. The stones wipe away the crud that the vinegar dislodges and they come right out because the are round.

Re: De-rusting process order?

B ,I was guilty... Not anymore. 🙂

Re: De-rusting process order?

Evapo rust is the best and safest takes a little bit of time to work. muriatic acid is the fastest and most dangerous way of doing it. But in my experience it's the best. whatever way you choose right after your rinse make sure you dump premix in the tank quickly to prevent flash rust just shake it up and then dump it out. personally I wouldn't seal any tanks it's a messy job if the metal has holes or is to thin it's not worth saving nor safe.

Re: De-rusting process order?

Dirty30 Dillon /

You can use salt and vinegar to make a slightly more acidic mix, it does not ruin your tank

Edit: Caswell is the only sealer I trust. (edited)

Re: De-rusting process order?

I tried the radiator shop down the road from me and was quoted $80, you can usually find a replacement here in buy/sell for half of that, so I used Redkote to fix some pinholes. Worked great until I rear ended someone with enough force to flex my frame.

Re: De-rusting process order?

i've been using muriatic for years, any tanks that leak after a thorough soaking with muriatic, get the pinholes brazed.

i don't mess with any of that sealer stuff, i believe caswell and redkote are both pretty good products but after the kreem debacle i don't trust anything.

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