There's a huge difference between recovery and regeneration, when you talk about regeneration you're talking about someone who can regenerate a severed arm, for example Marco, when you talk about recovery you're talking about someone whose ability to recover from a blow is at the highest level, but when you lose an arm the recovery will only quickly close the severed arm but it won't regenerate/grow another arm in its place, Kaidou is an example of this, he received the blows from the sheaths and then all these attacks were closed instantly, as well as Zoro's cuts, and later his strongest attack that even cut him deeply to the point of leaving a scar, Kaidou's recovery managed to heal the wound in a matter of seconds or minutes, the case of Saturn I would say that Kaidou can do the same as him, since it is like a insect bite.
Kaidou did this against more powerful blows with the ability to ignore durability so an attack without Ryou wouldn't even penetrate him, but assuming Bonney was using Ryou the power behind the blow would still be an insect bite for Kaidou.