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Just getting started on this '74 Colt SS 340... it's in GREAT shape, appears to have less than 400 miles. Picked it up last week for 3 bills!

Going through the fuel system, got the tank & seat off. Drained the tank, and inside I found what at first looked like a couple rolled up scraps of sandpaper. On closer inspection, it is some kind of defoliated coating from the tanks interior. Is this something Polaris did with their metal tanks back in the day? Looking inside I can't see where these pieces came off, but I can see that the coating layer in the bottom corner nearest the filler is beginning to lift. What to do? I'm inclined to leave it be... any other pieces that come loose will be big, and the previous pieces didn't seem to be breaking down into anything that could get to the filter. Anyone with a similar experience?
 

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That looks "Cherry".
I'd say just clean the tank as bes as you can and go for it.
Make sure that you have an inline filter on it.
 
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