Harold, consider joining our group as a full member and assuming all the benefits that come with it.
I have a 568 Signal Red car. Back in 2015, I had some repair to a fender that obviously required paint. My esteemed restoration shop, (Motorwerks Group, Commerce Michigan, owned by Dr. Satish Tumalla), told me (and you've seen that repeated here) that RED is one of the hardest colors to match; and yes they have all the sophisticated equipment IN HOUSE to do so, along with top notch craftsmen.
So, the fender repair begat painting the hood as well, the front clip, and careful blending down the sides of the car, with the goal of NOT being able to tell it was spot-painted. Those with a long memory may remember the paint was barely dry on my car at the last PUB in Blacklick.
Then, more recently (2020-2021), I had the door changed (from 230SL --> 280SL) and with that painting, the same kind of thing. Paint the door, and part of the fender and rear to blend it all together AND match the newly painted hard top as well.
The mark of a good job is not being able to tell there was a job in the first place.