I have successfully rebuilt 8 or so RN4081 attys reusing only the base, tube and ceramic cup. For my wicking material I cut about 3/4th an inch off of a Zippo Wick, and carefully remove the copper wire, and the cotton threading, which leaves behind a portion of 100% silica fiber. I fold this 3/4th inch length of fiber in half, doubling it upon itself before wrapping the nichrome coil around said fiber.
Each wick cost a bit over a dollar at any local liqour store or smoke
shop and contains enough silica to make 4 or 5 attys if your a perfectionist like me and trim/waste a good 30% of the intial length before setting it in the cup.
After running atomizers using this method for months of chain
vaping on all variety of
juice mixes at 3.7 to 6volts, the fiber always darkens or cures, but never burns away or turns into charred gunk.