I just purchased a WASR 10/63 and am doing a complete teardown/cleaning of all the cosmoline currently.

I am working on the bolt, but the retaining pin that holds the firing pin is stuck in place. I tried using a clamp and hammer with the pin removal tool provided in the cleaning kit to no avail. I've read guides on removing the pin and watched videos, and it's supposed to slide out with a little bit of pressure, but mine remains in place no matter what I do.

Any tips or tricks for removing the pin, short of going to a gunsmith? Would penetrating oil work?

Thanks in advance!