I'm starting a project taking an orange-tube Celestron Comet Catcher and modifying it for better performance. One of the first things on the list is to re-paint the inside of the tube to improve stray light control. Googling "blackest paint" I came across "Vantablack" which is unobtainium and "Black 2.0" which is available from Amazon, but is an acrylic. Articles of Black 2.0 seem to indicate it's quite black.
Does anyone out there have any experience with this product or have any suggestions for something else?