I just had the original yellow paint sandblasted off of one of my old, neglected Luxfer Al 40 deco cylinders. Purchased an "Oxygen 20 ft" band and an oxygen-service scuba valve from DGX, and put them on the now bare-metal cylinder. I drove the 2 hours to St Louis (to Y-kiki Divers) to leave the cylinder to be VIP'd and oxygen cleaned and subsequently filled with 100% oxygen (3,000 psig), and then drove back to pick up the cylinder.My dive shop fills my Al 80 with 3000psi of O2. And I wrote "oxygen" on the side with a sharpie.
My intention is to use this as an emergency oxygen cylinder, only. (I also purchased one of these DGX Gears Adapter: DIN to CGA-870 Pin Index POST, which I learned about from a SB post not long ago.)
I determined that it likely will be easier for me to get this scuba cylinder refilled with 100% oxygen than it will be to get a DAN or other medical oxygen cylinder refilled (since I don't have a prescription for medical oxygen).
FWIW,
rx7diver