Many when it comes time for the finish work at the end of a long build begin to get anxious to just finish and fly, this is when you should slow down and take your time through the prep work on through your finish. Utilizing the best materials always makes this process go a little smoother for sure, so as others have already stated, there is no substitute for the use of both blue and green fine line tape. Personally I use DuPont Chroma Systems base coat clear coat on all my model paint work but that is just a matter of choice, the clear coat can be applied in ether a gloss finish, through a flat finish by simply adding a flattening compound to the clear coat. Anyway take your time and you will be happy with your results.
Bob