tetra bromoethane is no regulatory gem either. Try pyrrolopyrrol, CAS (Chemical Abstracts) number 84632-65-5. Your friendly local paint place may know it as CI 254 red. Good UV stability and I think it will dissolve in tetra bromoethane.
Yes I know, I was warned not to drip any of it on anything. Of course I was warned after I had removed the gas gauge and dripped the liquid [img]<
>/eek.gif[/img] I'll give this suggestion to the gauge rebuilder.
Interesting is a local car restorer as given up on these and just put ATF in them and uses the old fill 'er up before you leave method.