If I was to have one refinished I’d probably go for a nitro very light relic so in time it would age naturally,
some from around those years are in very good condition and some are quite worn, I suppose it would depend on how well it’s been looked after and how much it was used, my 71 precision had one owner before me and he played it a lot for many years, it’s quite worn but still plays great, also I think you can also find that some have been aged unnaturally