Spray 2/5"OD small tube of cf inside with protective coating?

Hey guys, I’m new here. Hoping to get some help and engage in an interesting conversation!

I have an interesting task to perform. I need to spray inside of a small, 1 3/4" tube of carbon fiber with outer diameter of 10mm (approx 2/5") and inner diameter of 8mm (approx 1/3").

I have a few questions:

  1. How do I achieve such a delicate task? I can’t afford to have it messy inside. The apertures are very important to me. Current ideas: .2mm airbrush - but how do I fit it inside?
  2. What kind of epoxy resin (or anything else?) would you suggest? I need it to be high heat resistant and food safe (like ok to breathe and stuff.)

Would appreciate any help! Will be sending beers your way for the best answers :laugh: