Survivor400, glad to help.
Small dents, minor paint chips, and even some hints of rust are all signs of a true, unmolested survivor. Using a paintless dent repair to fix something is not a bad thing. The question is how well can you detect and/or not detect their work? The less you can see, the better.
Having the exterior buffed by expert is usually not a problem unless they somehow damaged the paint. It most cases this is not a problem. A true expert should refuse to do the job or warn you in advance if they think they are going to burn through the paint.
Lastly, is it the original deck lid or was it replaced with a new one and repainted? If the repair is left solely to the decklip, you are in good shape. However if a deck lid, quarter panel, inner and outer wheel house, etc. were replaced, that starts affecting your survivorship status. Most "true collectors" don't want to see anything more that 20% of replacement or repairs to the vehicle. General replacement of normal wear and tear items like batteries, tires, brakes, hoses, etc. are expected and are not included in that 20% figure.