Well...do what I did...to a buddy of mines RIA 1911 that he borked up trying to "blue"
Before..you can see his attempt to blue with the metal still having lube oil all soaked into it..it didn't take..then his attempt to clean it made it worse
The frame was even worse...parts of it had bluing, parts didn't..total mess!
Parts out of the parkerizing solution and after I drenched them in CLP..they are glistening wet with the stuff (thats why its shiny) but you can see just how black and thick the finish looks
Done and done..took about 4 hours to finish complete...with wash down, sand blasting, and parkerizing each part...assembled and function checked and it looked like a whole new rig!
Just washed it very clean in acetone (to dissolve all the oil/grease/funk that soaked into the metal)...sand blasted it with a cheapo Craftsman sandblaster and #80 aluminum oxide...re-washed it with non-chlorinated brake cleaner...soaked in a boiling solution of Manganese Phosphate on the kitchen stove till the part quit fizzing...took it out..rinsed it with as hot a water I could put on it, let the water evaporate off (due to the heat) then slather it it generously with Breakfree CLP and let it soak into the finish..
Nickel plating...good luck with that...
P.S. sorry for jumping on you wanting to get your pistol refinished...