May I suggest sending it to Frank Glenn for the tune-up and leave the finish as is.Frank did my Python in two weeks from check out to check in and that included replacing the hammer.Does fantastic work.JMO D*
I sent my 1st Python back to Colt for a refinish in the early 90's. I used it for PPC (distinguished revolver) and it had holster wear only. It was a perfect candidate for a refinish...no dings, pitting or damage, just holster wear from drawing and holstering in matches. Colt destroyed my gun; edges were buffed over, Pony half-gone, screw-holes deeply dished, lettering almost buffed out. It was ruined. I sold it. I've since looked over (carefully) several refinished examples and the workmanship is a good as mine was bad. I'd have no problem sending in a Python for a refinish now.
I submitted a Cobra earlier this year that was going out of time and it took them nearly 7 months to get it back to me.
BTW - when they ship it back to you they send it requiring a direct signature unless you specify otherwise. In my case only an 'indirect signature' works as I am not home during regular business hours. I would call customer service ahead of time and let them know if you need that option.