Find a smith that does Parkerizing, and let them strip and refinish the gun.
Unless you are fully prepared and willing to live with a ruined gun ("ugly"-ruined), go with a gunsmith. Even if you have to find an smith in a different state, do your gun and yourself a favor and have it done right. You wont regret it...like you very well might if you do it yourself. And as you say this is a Springfield Armory 1911, I dont think you want that as a ruined gun.