The tank on my bike has a super paint job and is solid but unfortunately seems to be covered in surface rust on the inside.
in order to prevent this from making its way into the carbs/engine I would like to try and clean out the inside removing the rust.
Any members have any good tips or recommend any product to do this?
Hi there are a fex methods to get your tank inside clean, but first check that the metal is not going to make holes; usually you see paint starting to act stange outside. well; the idea take the tank, fill it with abrasive products and shake untill rust goes . you first clean the tank with a detergent soap, and water to take out all gas and sticky things, after taking out the tap, and putting cork or other to shut holes, you choose either small bolts and screws, or small gravels or even a bicycle chain , that you put into the tank. Add phosphoric acid or choloridric adid, diluted 50% with water ( take care and put gloves on ) and start singing: " shaking all over!" change the liquid a couple of times untill it goes out clean. it can take a while, and you can invit friends for a couple of beers, and pass them the tank. dry, with a air blower, let completely dry out, check inside for small holes, carefully with a lamp; It is time that you know if your tank is still OK or needs replacement.
then, you can use a polyuréthane resin to coat and protect the inside. do it outside, because it stinks hard. check that the resin you use can stand ethanol mixed gas. ( not all do ) the brands are : Petseal, Restom, or G4. you mix, put in the tank, shake again slowly, and let dry a few days before filling the tank with gas again. That's it, your Veenie is ready to hit the road. Remember to put the acid bottle out of reach.
good work, good runs, Hervé. ( apologies for my english, I am only a frenchman )