Don Terrill’s Speed-Talk

What do people like for checking ring and pinion pattern ?

A thin coat of bluing is too faint for my taste.

Maybe time to but some of the "red lead" referred to in those old shop manuals.

I use GM Gear Marking Compound. It is yellow and shows up real well. Part number 1052351 It works great on the tips of valves too for rocker geometry.

https://paceperformance.com/i-6484606-1 ... s-etc.html

You can get it on Amazon also or your local GM dealer.

Obviously don't use red lead any longer. Technicians used to stain/paint porcelain with fine brushes (one such stain was red lead). A bad habit was when they licked or wetted the hairs to create a fine point. Doubtless this was done with radium as well. Needless to say, that was not conducive to a long life.

"minium" is still available.
https://www.naturalpigments.com/minium-100g.html

But I like the thought of the GM product better.

Maybe I better have a peek at the ingredients list and MSDS before I use it on hot dogs

I use zinc oxide in a petrolatum base.... Baby diaper cream