Using it since 1983...still happy with it.
Get a wide 3/4 to 1 inch soft high quality sable brush. I paint the end of the handle so I know it's my Future brush. DO NOT USE IT FOR ANYTHING ELSE.
Start on the high point of the model, I start on the roof. Keep a wet edge and move quick but not fast. Roof, trunk, hood and sides. If you put on too much you can wick away the extra with a cloth or paper towel. If you really mess it up somehow you can wash it off with hot water if its not dry.
Allow to dry 24 hrs before you handle it. It it gets dusty use a clean soft cloth damp with water to clean.
If it really gets dull a thin coat of Future will restore.
This 'Cop Out' is Tamiya black, no primer, with Future floor shine after decals. Check the roof reflection....good stuff!