If it's paint-on-steel, electrolysis will strip that paint in very short order. If you never used electrolysis before to clean metal, do your research first!! It's easy, relatively inexpensive, but don't go into it ill-prepared or uneducated about the process and the science.
My favorite, most dependable carry pistol is a 9mm compact Kimber 1911.
I have a couple S&W .45 1911's that are still in the boxes. Someday I might just have to give them a try at the range but I would never consider carrying a full size 1911.
Also what every you do, KEEP YOUR 9MM AMMO. Speaking from experience I have switch platforms so many times and sold my ammo think I would never use it, just to buy it again a year later. Trust me, it happens a lot.
One thing I definitely want to replace on the Para Expert is the plastic trigger, and I'll probably replace the grip safety too, just to sex it up. Oh, and I need some wooden panels. The other thing that needs a looking at is the mag release. On the Expert, you cannot push a magazine in easily without pushing the mag release a little (maybe it just needs sanded down a bit). Any advice as to what parts to get, or where to get them would be appreciated.