Treat each and every piece of the model, as a model in itself. Carefully clean up rough edges, sink marks etc. Then if possible add detail to the part. This could be done by replacing raised detail with photo etch, 3d decals, etc. Do a lot of searching to see what kind of after market "goodies" are available for your project. Take your time when painting and use good quality paints and supplies. If your curious about how something may have been on that car, ask here before you guess. You'll get tons of knowledgeable answers. Hope this helps.