But it's gonna flashrust within a week anyway? The only way to prevent rust inside the tank is to coat it with a tank sealer.

 

As much as i want to use a tank sealer such as Caswells or POR-15 since i've heard great things about them. The stores from where i'm from don't have those, I would ship it over to my country but the customs here don't allow hazardous chemicals such as those.

 

Caswell two part tank sealer

 

6. coat with 2 stroke oil / marvel mystery oil (quite expensive tho).

try this quite a bit cheaper
https://www.amazon.com/STA-BIL-2200...000H7CKAY/ref=sr_1_6?dchild=1&keywords=fogging+oil+marine&qid=1617294648&sr=8-6

 

Hey thanks for the suggestion. This looks promising but i can't seem to find it in any online shops. Do you reckon Sta-bil fuel stabilizer would do the trick, since i already have it?

 

I would not seal the tank with any of the suggested treatments. What you could do is simply use a fogging oil or use clean motor oil thinned with kerosene and slosh it all around, then when you are comfortable that you have gotten that oil mixture everywhere (I would think a half quart or half liter together with half quart or half liter of kerosene) then drain that all out and close up the tank and you can leave it sit. Later after your painting is complete, take a quart of gasoline and slosh it all around in the tank, drain that - perhaps do that twice, then mount the tank on the bike and fill the tank up as much as you can with fresh gas. Earlier make sure you got all of those nuts & bolts out of the tank, also paint the neck of the tank somewhere in this process, so it is nice, clean and fresh - make sure that paintwork is impervious to gasoline. I would keep the tank pretty full of gasoline as you can, that will keep it from rusting. You might as well install a new petcock & gaskets while you are at it - I'm assuming this not an EFI bike - but not sure. I don't think I would mess with acetone, while it is nice, it is aggressive and could damage petcock pipes and perhaps some of the paintwork you didn't want etched. BTW, acetone is not good for your lungs. Good luck with all of this, let us know how it turns out.

 

I would not suggest sealing the tank with any of the suggested treatments. What you could do is simply use a fogging oil or use clean motor oil thinned with kerosene and slosh it all around, then when you are comfortable that you have gotten that oil mixture everwhere (I would think a half quart or half liter together with half quart or half liter of kerosene) then drain that all out and close up the tank and you can leave it sit. Later after your painting is complete, take a quart of gasoline and slosh it all around in the tank, drain that - perhaps do that twice, then mount the tank on the bike and fill the tank up as much as you can with fresh gas. Earlier make sure you got all of those nuts & bolts out of the tank, also paint the neck of the tank somewhere in this process, so it is nice, clean and fresh - make sure that paintwork is impervious to gasoline. I would keep the tank pretty full of gasoline as you can, that will keep it from rusting. You might as well install a new petcock & gaskets while you are at it - I'm assuming this not an EFI bike - but not sure. I don't think I would mess with acetone, while it is nice, it is aggressive and could damage petcock pipes and perhaps some of the paintwork you didn't want etched. BTW, acetone is not good for your lungs. Good luck with all of this, let us know how it turns out.

Hey thanks for the tips! I've been seeing a lot of people recommend kerosene and motor oil as it's worked for them with storing empty tanks for years without getting any rust, i'm planning on using this method but should i skip the rinsing the tank with water and baking soda?

 

You need to neuatralise the vinegar. That's what the baking soda is for. There is no way you can prevent it rusting without a sealer so you can skip the acetone and oil and all the other stuff - just get it painted and filled up.

 

so after vinegar and neutralising just fill up with fuel and good to go just in the process now with vinegar in the tank for 2 days thanks

 

Yes, rinse the tank with water & baking soda to neutralize the vinegar - that is still a proper & necessary thing to do. Your choice on whether to use a sealer.

 

Yes, after the flush you are good to go.
I did a light oil spray until I was ready to fill the tank with fuel. Different brands of bike, and I did a similar process on two bikes, but the same great results. I used a rust remover liquid over vinegar. Rinse process was the same.

 

I wonder if you can zinc plate the inside of the tank... battery, electrolite and a zinc anode.
I was going to google it, but google is struggling tonight