I finally countersunk a counterweight a few nights back, dull grey 8 year old lead weight, shiny new countersunk surface. Tested fit with bare aluminum dimples, fits' ok, up on the shelf for a few days.
Fast forward a few days, and when I look at it last night, there is a perfect blue coating on the countersunk surface, just cut a few days before.
I don't remember this happening with my other counterweights.
The coating came off with very light pressure and rotary movement.
Any ideas as to what happened? I suspect some sort of chemical reaction with the exposed fresh surface, but with what?
I first suspected a blue sharpie and a joker, but couldn't duplicate the look with my sharpie.
Fast forward a few days, and when I look at it last night, there is a perfect blue coating on the countersunk surface, just cut a few days before.
I don't remember this happening with my other counterweights.
The coating came off with very light pressure and rotary movement.
Any ideas as to what happened? I suspect some sort of chemical reaction with the exposed fresh surface, but with what?
I first suspected a blue sharpie and a joker, but couldn't duplicate the look with my sharpie.
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