Have you fired it yet? If so, how does it shoot? Is it accurate?
My suggestion is to really clean the barrel and chamber well, then run some Sweet's through it before you do anything else. You may be surprised.
Good luck, let us know how it turns out.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams