If it all comes off on its own then yes, that's fine. If the snake has to be helped through the process then no, it's not okay.
Never do this. If the shed does not come off on its own, the best you can do is soak your python, give it a towel to slither through, and keep humidity up for the next shed when the leftover bits will hopefully come off. If you're actually peeling the shed off, you're risking some serious damage, since there's usually a reason the shed isn't coming off on it's own. What process exactly are you following when your fire fails to shed? What are your actual humidity levels? Do you raise them whenever your fire shows signs of a shed? What kind of enclosure do you have your snakes in and what substrate are you using? Pictures of the enclosure would help identify the problem here.