Any suggestions on how to deal with a neglected 999 tank? I'm considering cleaning and sealing with POR 15. Anyone had to deal with something similar on a 999/749?
Cider vinegar - a gallon is quite cheap and will take the rust off overnight, or use electrickery witchcraft as mentioned on here recently
Phosphoric acid (google it ) dissolves the rust and protects the surface, used it a few times over the years with no issues ( similar to vinegar but chemically different ) if it's surface rust nothing else required if its deep pitting the tank want's sealing
Thanks for the info. I finally found some time 2 weeks ago to flatten back the rust using 150grit paper. I was cautious about using any chemicals for fear of flash rusting, if I wasn't going to follow up with a sealant of some sort. Earlier in the year i used a more extreme technique involving brick acid on a couple of old yamaha tanks, Then successfully sealed with POR15.
