Cleaning Stained Celluloid Windows

[provis]

I would like your opinions on this little matter

 

I have the great fortune of having in possession over the last few years, a modest collection of 13X pens that still have clear yellow striped windows, with a slight issue: no doubt because they were kept in storage by previous owners and only taken out when they were sold, most of the windows sport stubborn decades-old blue stains for a good third of the visible space.

 

What would you recommend to remove the stains and how? So far, most threads recommend Ink Nix, amodex and rapido-eze. I understand these work well on modern plastics, but are they safe for use on 50s celluloid?

 

Thank you.

[johnkim424]

Send the pens to Fountainbel, for a good window cleaning. He can clean most of the gunk out of the window. As far as I know there are no known chemical agents for cleaning celluloid ink windows.

[Sblakers]

I was hoping to hear some fellow fpn'ers found the cure for stained celluloid as well. I use iron galls in my mb 138 and 139 and worry I might be staining pretty clean ink windows. Was hoping JB flush might be the answer but I don't think it takes off iron gall residue- at least for me it hasn't( tested it in a converter with iron gall residue. -- only way to get residue off was to use a Q tip). Guess if I do stain my pens they will have to take an over seas spa day.

[provis]

It seems like rapido-eze is much preferred over Higgins, and Simichrome (horror!) was also bandied about as a definitive solution. But seeing how the latter would eviscerate the painted celluloid stripes, I would very much avoid the latter.

 

The stains look like something left over from Bay State Blue, but seeing how old these pens are, I doubt modern inks are the cause of them. Would Iron Gall leave behind turqouise-looking stains?