I recently built an aircraft, a PBY Catalina for my Barber who's father served on one in the South Pacific in WWII as a "sub hunter". I got more enjoyment and satisfaction out of building that for him than I ever got building one for myself. I think Models are a great gift, with all of the time and attention to detail they require. I think a clean out of the box build will be just fine, taking your time to clean up (sand/file/fit) the parts prior to assembly, and a light dusting of Artist pastels will make for an excellent gift. Maybe try to duplicate the markings of his exact vehicle. I did this for my build, made decals with my friend's fathers' name on them. I didn't come out perfect, and I had a lot of issues along the way, but seeing the look on his face was the most satisfaction I have ever got from a build. Take your time, test fit parts, and do your best! I am nowhere near the skill level of any of the guys on here, but I am trying new techniques every time I build! This was my first two-tone paintjob, first attempt at using future for decals, first time using an airbrush, etc! good luck!!