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Bultaco tank how to clean inside


Old man
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Hi first thankyou for help I do appreciate it.Pictures of metal tanks is there a fluid I can buy to clean out tank and second need filler for side of tank a lot of dents and has been filled before.I have been watching YouTube to see if could pop dent out to original shape but scared of splitting tank.So looking for a good filler to do one side the other side is fine thankyou

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6 hours ago, copemech said:

Buy a plastic tank!

Yes and suffer ethanol attack overnight. The dents could be persuaded out with a lever inside the filler if you can reach, otherwise any good quality body filler will do the job if the surface is correctly prepared. A high build type filler such as Isopon would do the job depending on your skill level. Apply thin layers and allow to dry out before applying next coat, work slowly, mix the filler and hardener with a folding action rather than a stirring one, this reduces the amount of air introduced by mixing. Rub down with progressively finer wet and dry paper until satisfied that the surface is smooth, even and pit free. The more you get the dent out the less filler and weight will be needed. Copemechs suggestion is not unreasonable provided the plastic will resist ethanol attack. This crappy chemical additive even attacks the o ring seals on cars let alone bikes. It won’t be long before nothing runs because we’ve scarred ourselves into EU rules that are unachieveable. 

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Hi Sir thanks got a couple of plastic tanks but wanted metal.Will be going out today so will see if can pick that filler up as need some black spray for the forks thankyou                                      

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