Gear Marking Compuond

[Patrick45015]

I'm starting to think I am the only person that ever uses it. No place around even knows what it is let alone get it. I talked to a few car dealerships that said they rebuilt diffs and the don't know either(scary). Last time I even called my instructor to find out where the heck they got it. He said Pep boys in Dayton. I went to the local one to find out its service only not auto parts. The guy at O rileys brought out a paint marker lol. So other than ordering it online does anyone know a local place to get it. Or are people using something different to check contact patterns when setting up diffs