Why don't you just double up the top reinforcement in that zone.
Half the bars have a cog to achieve development in the temporary case.
Half the bars have a coupler attached so they can be joined to the reinforcment in the later pour.
You can get ultrasonic thickness testers. My company has one and it works reasonably well.
https://www.starrett.com/products/precision-measuring-tools/thickness-testers-and-accessories/thickness-testers
I read some of your other topic but not in great detail.
Is this correct? To me, the definition of "pure compression" is when the column is loaded through its centroid (i.e. zero moment).
I agree with Just Some Nerd that that particular clause in the code is meant to apply to industrial warehouse type buildings with tilt-up precast walls.
Why is that? I have been told by a competent welder that galvanizing doesn't need to be removed, similar to what Lex said above. What is different about stud gun welding?