Oh the joys of restoring a 20 yr old bike. This is the fuel petcock screen as i pulled it out to drain for paint. This is why you never leave a bike set with less than a full tank. Any empty space will allow condensation at night and cause tank rust. So, I flushed it with lacquer thinner and got out all the gunk and I'm just painting her black and saving the custom work for when I buy a new tank next winter. Looks like I'll be carrying spare fuel filters in my pocket all summer