I think you picked a good pistol for the project. I am generally a purist, but when no original finish remains I think customization is appropriate. Nice looking SAA. David does great work in the old style.
I have a couple of David Harris 1911's. I didn't commission the work, but contacted David after I purchased the two. He confirmed the work and even sent me a certificate of authenticity for each. I don't know who did the ivory work.
The top pistol is a .38 super from 1969. The second pistol is a series 70 combat commander in .45 acp.
This is a Colt Bisley model in .41 colt that had seen better times. The engraver/refinisher was careful not to over buff. There are still hints of pitting in some areas under the French grey. I like the way the remaining nitre blue was left untouched and how the gold contrasts with the grey and blue. In this case, original grips were used. Again, I did not commission this work, but I spoke to the engraver who did it. He's a Floridian, but his name escapes me right now. I would have to do some digging if it doesn't come to me.