I cannot tell by your profile where you are from? But if you have a few weeks or more until you need that gun for a muzzle loading season, like here in Pa, you could be using it by bthen. That is how great those Kibler kits are.
Also, I am far from expert, for sure. But I have used Permalin and it makes a great finish. But since then I have used the Chambers Oil finish. I find that even easier and I like the final look better. Seems to me to be not quite the "cheap shoe shine" if you get my drift.
Also, the permalin accumulated in my inlets and I had a tough time digging it all out. But that was probably because I was using too much of it??
Good luck with your project.