Wheel balancing

[DoubleEagle]

Equal "claims" to be unaffected by moisture

That may be true now, my experience with Equal was 22 years ago. Go ahead and use it, and use a lot of sweaty air. Report back after a few years, particularly after the bus has sat for awhile in cold weather.

[gumpy]

Looked up Centramatics. Average $200 per axle. Pretty expensive. Maybe why antifreeze on tag axle?

Yep. That, and the fact that my tags were rotated from the front and are already worn or cupped. 16 ounces of a/f in each works well for me.

Your mileage may vary.