New refinement on the process. And it involves capping and removing and capping 3-4 times per bottle. Definitely better to reuse the old cap.
The label will scrape off mostly leaving glue lines right as it comes out of the fridge, cos its had the cold and moisture wet it (yes my fridge has a drip of water in the back. I'll be moving it outside onto the patio when the deck over it gets built, a month or less hopefully) and let the thing just flood and drip out the bottom. I have all these bottles laid out in the back catching that drip. So The label comes out leaving glue lines. Over the next 2 hrs I drink it with it being sandwiched between frozen vegetables in the freezer with it recapped each time. Then when its done, I cap it again, I use hot tap water inside and out scrubbing off the remaining paper and glue with scrubber. Then I dump all the water out from inside it and put the clean on the outside and inside bottles away.
Then when 8-12 bottles are collected up (which is where I am now) I boil water in my kettle, and a 1/4 teaspoon of starsan goes in the funnel in bottle #1. That gets poured to #2, then to #2, then to #4 and so on. Boiling water starsan runs through 1-12 and then put the caps in that. Then plain boiling water goes through them 1-2 times. No need to cap in the middle of this run. Then get the caps out of star san and cap the still hot bottles. Then put em in the original box (to keep from getting dusty on the outside). Then on bottling day, you pry off all the caps and toss em and bottle with fresh new caps. This needs maybe 4-5 uses of a cap, its good for that purpose, just not good enough to make a seal against high pressure in the bottle. Low pressure in the bottle its much better at sealing.