The tools to help you achieve the best result are:

Spray Bottle filled with weak soapy water.
Mix: 3-4 drops of dishwashing concentrate to 500ml (2cups) of water.
Masking Tape.
Cutting Polish (automotive – e.g. Autoglym 03B or similar).
Small scalpel type knife or blade.
A couple of clean rags.
Acetone or wax & grease remover (automotive).
Plastic Squeegee – with our compliments.
Graphite Pencil or China Graph Pencil.