Blast them at work and shoot black paint on them.
Thats what I was thinking. We have high temp muffler paint I can use. I may just go with that. If it does not work I can get the ceramic coated.
Man, I have had zero luck with that plan. It always ends up looking like shit after the heat gets to it. Fuggin' bike headers get HOT

Granted, paint may be better these days, and I am sure my prep work as a 22 year old was not what it should have been.
If you can blast them, it worth a shot.