I've been searching the forum but couldn't find the answer to my question. I'm trying to cover the inside of a 10mm carbon fiber tube with inner diameter of 8mm in thin layer of high temp food safe epoxy resin. The inner aperture is very important to me (precision I'm looking for is up to hundreds of mm). I achieve needed inner diameter by drilling with precise drill bits. The tube is approximately 50mm in length. My questions are: