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Petrol proof paint for a plastic fuel tank.

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9.1K views 43 replies 12 participants last post by  Ship  
#1 ·
Despite being careful with what fuels l put in the tank of my 950 SM, l have sometimes had to use cheapo stuff. Although use of ethanol has been limited, the tank has some blistering starting.

Keen to sand it and repaint.

No idea what spec the KTM paint is, but this will need to be a DIY job as l dont trust a paint shop to use the right stuff and not fill the tank with dust etc.

Anyone used any black spray can paint that works?
 
#2 ·
Anything that isn't 2k is going to be a compromise, and will likely dissolve at the sight of the smallest spill. You can get 2k paint in a can, the hardener is inside a breakable vial and has to be well shaken, purely for pro use though. You really don't want to be breathing that stuff in, so use it outside on a still day.
 
#3 ·
From memory, the basecoat beneath the graphics was almost like a shrink wrap film rather than an applied paint.
Best of luck though because, as we know, they are tricky things to deal with. I guess it would need to be permanently flexible.
 
#5 ·
Hi David - sadly its the tank l got from you ..... its done well for years, but a couple of 'having to' fills with e10 have given it measles.

It only ever seems to be the 950 sm tanks and the early 950 adv tanks that suffer - the americans seem to suffer the worst, and go to the greatest lengths to try and combat it, most of which seems to involve tank lining and plastidip coatings. Not for me!
 
#8 ·
It lasted longer than I would have expected but it was sadly always inevitable, I suppose.
I went for the film thought as it bubbled but stayed flexible.
I recall that orange bits were coloured in but black was painted over but wouldn’t have applied to the tank. Even Crispy’s graphics succumbed within a year to the dreaded E.

I do still miss my SM though, but I would had to get it lowered nowadays. My inside leg measurement seems to have shrunk by an inch or two.
 
#10 ·
Speak to a local auto paint supplier, if they are decent they'll have an idea what to use. (there's 2 within 15 mins of mine, one is completely useless and the other is the opposite..)
 
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#12 ·
I'd hand it over and let them do it, they should be well prepared for painting various plastics, as cars have had some amount of plastic bodywork since the 1980s.

Rattle cans can give a good finish, but a professional paint shop would be guaranteed to make it an exact match, and be aware of how flexible it needs to be.

Painting is not easy, it's all in the preparation, if you were to mask the tank yourself, then there wouldn't be any issue with dirt ingress.
 
#14 ·
You can buy 2k paint in a can as mentioned above.
Look online. The tech behind it is having to pierce the bottom of the spray can before you shake it for the specified time.
The paint suppliers will make up any colour for you.
Not cheap, but a whole lot cheaper than farming the job out.
Doing it at home on a still day away from anyone with the best mask available is key.
If you've not sprayed with a can before, watch a few videos.. not difficult.
Prep. Well. Use a wax/silicon remover/ tack cloth... and go for it.
You'll have a shock at how good you can get the finish.

Edit: Quick search:
Sent from my SM-G955F using Tapatalk
 
#18 ·
Let’s face it, getting a monkey to diy it will be better than how an ethanol‘d SM tank looks.
Even with the extra thick super-sticky Crispy graphics on it, it looked like it had an horrendous case of boils when I px’d it with Premier Bikes.
 
#21 ·
I'll just need to be careful with sanding to not remove too much material and keep it clean - acetone helps clean and 'close off' the pores apparantly - l will also then inspect for any potential failures, fill, then 2k paint using the product above. I might even leave the base unpainted.

Looking at the fuel cap, the breather hose outlet is very small - l will look at enlarging that so fumes have a better exit.

And all because of a small number (3 or 4 max) of E10 fills.

I will need to ensure that l use BP E5 from now on entirely or carry Stabil for those E10 unplanned fills.

Bloody ethanol, but its only the 950 sm / 950 adv tank that suffers.

I understand from a dealer mech friend that some Triumph tanks are also suffering.
 
#23 ·
The SE tank appears to be a different kettle of fish - no fuel damage at all, so l assume its a different plastic. My SE tank is blemish free, so l cant confirm if its painted or not.

Saying that, from what l have found, its only the 950 SM and early 950 ADV tanks that can suffer.

KTM painted some early plastics whilst some were just black plastic (even if both came from acerbis) no consistency!
 
#30 ·