Gyle is the brewing name for a batch. So for a simple brew, I'd just have a number code - 73 or whatever.
Thanks for explaining that to me, didn't know that. (told you I was green!)
It's fairly rare for me to keep it that simple though, I usually split a batch into gallon buckets to try different yeasts or dry hops or temperatures - in which case it might be 73PJ for the Proper Job yeast, or 73-23 for WLP023.
It's quick and easy to do, and if you want something fancier if you're giving the odd bottle away or something, then as squirt of propanol or meths will wipe off the markerpen and you can then do a proper label, or write on the bottle with white pen or something.
I think this is likely where I'll end up with, though unfortunately my handwriting's crap following years of keyboard-bashing and I'm afraid even I won't know what's in those bottles. Still, it's a nice 'analogue' feel, especially those white markers.
For cleaning off labels, yours or commercial ones, the best thing are stainless steel scourers like this
Cheers - got some Brillo pads by the utility room sink that are there to help with stubborn curry remains, should do the trick. I once used a spare plastic FV to wash out recycled bottles, and one of the labels unexpectedly came off and glued itself to the base of the bucket, despite soapy water. Was a real bugger to shift too ...